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CERTFR-2024-AVI-0644
Vulnerability from certfr_avis - Published: - Updated:
De multiples vulnérabilités ont été découvertes dans le noyau Linux de Red Hat. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service à distance, un contournement de la politique de sécurité et un problème de sécurité non spécifié par l'éditeur.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Red Hat | N/A | Red Hat Enterprise Linux for x86_64 9 x86_64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux for Power, little endian 9 ppc64le | ||
| Red Hat | N/A | Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.4 ppc64le | ||
| Red Hat | N/A | Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.4 ppc64le | ||
| Red Hat | N/A | Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.4 x86_64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux for Real Time for NFV for x86_64 - 4 years of updates 9.4 x86_64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux Server - AUS 8.6 x86_64 | ||
| Red Hat | N/A | Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 9.4 aarch64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.4 x86_64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux Server - TUS 8.6 x86_64 | ||
| Red Hat | N/A | Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 9.4 x86_64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.4 aarch64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux Server - AUS 9.4 x86_64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.4 s390x | ||
| Red Hat | N/A | Red Hat Enterprise Linux for ARM 64 9 aarch64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le | ||
| Red Hat | N/A | Red Hat Enterprise Linux for Real Time 9 x86_64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux Server for ARM 64 - 4 years of updates 9.4 aarch64 | ||
| Red Hat | N/A | Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 9.4 ppc64le | ||
| Red Hat | N/A | Red Hat CodeReady Linux Builder for Power, little endian 9 ppc64le | ||
| Red Hat | N/A | Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 9.4 s390x | ||
| Red Hat | N/A | Red Hat Enterprise Linux for IBM z Systems 9 s390x | ||
| Red Hat | N/A | Red Hat CodeReady Linux Builder for x86_64 9 x86_64 | ||
| Red Hat | N/A | Red Hat Enterprise Linux for Real Time for x86_64 - 4 years of updates 9.4 x86_64 | ||
| Red Hat | N/A | Red Hat CodeReady Linux Builder for ARM 64 9 aarch64 | ||
| Red Hat | N/A | Red Hat CodeReady Linux Builder for IBM z Systems 9 s390x | ||
| Red Hat | N/A | Red Hat Enterprise Linux Server for IBM z Systems - 4 years of updates 9.4 s390x | ||
| Red Hat | N/A | Red Hat Enterprise Linux for Real Time for NFV 9 x86_64 |
References
| Title | Publication Time | Tags | ||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
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"description": "Red Hat Enterprise Linux for x86_64 9 x86_64",
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{
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"product": {
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{
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"product": {
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"vendor": {
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}
}
},
{
"description": "Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.4 ppc64le",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.4 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for Real Time for NFV for x86_64 - 4 years of updates 9.4 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux Server - AUS 8.6 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 9.4 aarch64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.4 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux Server - TUS 8.6 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 9.4 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.4 aarch64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux Server - AUS 9.4 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.4 s390x",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for ARM 64 9 aarch64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for Real Time 9 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux Server for ARM 64 - 4 years of updates 9.4 aarch64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 9.4 ppc64le",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat CodeReady Linux Builder for Power, little endian 9 ppc64le",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 9.4 s390x",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for IBM z Systems 9 s390x",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat CodeReady Linux Builder for x86_64 9 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for Real Time for x86_64 - 4 years of updates 9.4 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat CodeReady Linux Builder for ARM 64 9 aarch64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat CodeReady Linux Builder for IBM z Systems 9 s390x",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux Server for IBM z Systems - 4 years of updates 9.4 s390x",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
},
{
"description": "Red Hat Enterprise Linux for Real Time for NFV 9 x86_64",
"product": {
"name": "N/A",
"vendor": {
"name": "Red Hat",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2024-27030",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-27030"
},
{
"name": "CVE-2022-48743",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-48743"
},
{
"name": "CVE-2024-38596",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-38596"
},
{
"name": "CVE-2024-36929",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-36929"
},
{
"name": "CVE-2024-26852",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-26852"
},
{
"name": "CVE-2024-35907",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-35907"
},
{
"name": "CVE-2024-36020",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-36020"
},
{
"name": "CVE-2023-52784",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-52784"
},
{
"name": "CVE-2024-36952",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-36952"
},
{
"name": "CVE-2024-26880",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-26880"
},
{
"name": "CVE-2024-36025",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-36025"
},
{
"name": "CVE-2024-26773",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-26773"
},
{
"name": "CVE-2023-52809",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-52809"
},
{
"name": "CVE-2024-26733",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-26733"
},
{
"name": "CVE-2024-35885",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-35885"
},
{
"name": "CVE-2024-26908",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-26908"
},
{
"name": "CVE-2024-36924",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-36924"
},
{
"name": "CVE-2024-35857",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-35857"
},
{
"name": "CVE-2023-52458",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-52458"
},
{
"name": "CVE-2024-26737",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-26737"
},
{
"name": "CVE-2023-52667",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-52667"
},
{
"name": "CVE-2024-35960",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-35960"
},
{
"name": "CVE-2021-47548",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-47548"
},
{
"name": "CVE-2021-47459",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-47459"
},
{
"name": "CVE-2024-26982",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-26982"
},
{
"name": "CVE-2024-38580",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-38580"
},
{
"name": "CVE-2024-27046",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-27046"
}
],
"links": [],
"reference": "CERTFR-2024-AVI-0644",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2024-08-02T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
},
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans le noyau Linux de Red Hat. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer un d\u00e9ni de service \u00e0 distance, un contournement de la politique de s\u00e9curit\u00e9 et un probl\u00e8me de s\u00e9curit\u00e9 non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans le noyau Linux de Red Hat",
"vendor_advisories": [
{
"published_at": "2024-07-29",
"title": "Bulletin de s\u00e9curit\u00e9 Red Hat RHSA-2024:4902",
"url": "https://access.redhat.com/errata/RHSA-2024:4902"
},
{
"published_at": "2024-07-31",
"title": "Bulletin de s\u00e9curit\u00e9 Red Hat RHSA-2024:4928",
"url": "https://access.redhat.com/errata/RHSA-2024:4928"
}
]
}
CVE-2021-47459 (GCVE-0-2021-47459)
Vulnerability from cvelistv5 – Published: 2024-05-22 06:23 – Updated: 2026-08-05 08:47
VLAI
EPSS
VEX
Title
can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv
Summary
In the Linux kernel, the following vulnerability has been resolved:
can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv
It will trigger UAF for rx_kref of j1939_priv as following.
cpu0 cpu1
j1939_sk_bind(socket0, ndev0, ...)
j1939_netdev_start
j1939_sk_bind(socket1, ndev0, ...)
j1939_netdev_start
j1939_priv_set
j1939_priv_get_by_ndev_locked
j1939_jsk_add
.....
j1939_netdev_stop
kref_put_lock(&priv->rx_kref, ...)
kref_get(&priv->rx_kref, ...)
REFCOUNT_WARN("addition on 0;...")
====================================================
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 1 PID: 20874 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0
RIP: 0010:refcount_warn_saturate+0x169/0x1e0
Call Trace:
j1939_netdev_start+0x68b/0x920
j1939_sk_bind+0x426/0xeb0
? security_socket_bind+0x83/0xb0
The rx_kref's kref_get() and kref_put() should use j1939_netdev_lock to
protect.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
9d71dd0c70099914fcd063135da3c580865e924c , < a0e47d2833b4f65e6c799f28c6b636d36b8b936d
(git)
Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 864e77771a24c877aaf53aee019f78619cbcd668 (git) Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < 6e8811707e2df0c6ba920f0cad3a3bca7b42132f (git) Affected: 9d71dd0c70099914fcd063135da3c580865e924c , < d9d52a3ebd284882f5562c88e55991add5d01586 (git) |
|
| Linux | Linux |
Affected:
5.4
Unaffected: 0 , < 5.4 (semver) Unaffected: 5.4.156 , ≤ 5.4.* (semver) Unaffected: 5.10.76 , ≤ 5.10.* (semver) Unaffected: 5.14.15 , ≤ 5.14.* (semver) Unaffected: 5.15 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv\n\nIt will trigger UAF for rx_kref of j1939_priv as following.\n\n cpu0 cpu1\nj1939_sk_bind(socket0, ndev0, ...)\nj1939_netdev_start\n j1939_sk_bind(socket1, ndev0, ...)\n j1939_netdev_start\nj1939_priv_set\n j1939_priv_get_by_ndev_locked\nj1939_jsk_add\n.....\nj1939_netdev_stop\nkref_put_lock(\u0026priv-\u003erx_kref, ...)\n kref_get(\u0026priv-\u003erx_kref, ...)\n REFCOUNT_WARN(\"addition on 0;...\")\n\n====================================================\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 1 PID: 20874 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0\nRIP: 0010:refcount_warn_saturate+0x169/0x1e0\nCall Trace:\n j1939_netdev_start+0x68b/0x920\n j1939_sk_bind+0x426/0xeb0\n ? security_socket_bind+0x83/0xb0\n\nThe rx_kref\u0027s kref_get() and kref_put() should use j1939_netdev_lock to\nprotect."
}
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"value": "AV:L - The bug is reached only through local syscalls (socket/bind/close) into j1939_sk_bind \u2192 j1939_netdev_start/stop; it is not triggered by receiving CAN/J1939 frames from the wire.\nAC:L - The race is fully attacker-controlled by opening multiple J1939 sockets and concurrently binding/closing them on the same CAN interface, as demonstrated by the syzbot threaded reproducers.\nPR:L - Creating and binding CAN_J1939 sockets requires no capabilities; an unprivileged user can reach the path on an existing UP CAN device or by creating vcan in a user/net namespace with namespaced CAP_NET_ADMIN.\nUI:N - Exploitation requires no victim action beyond the attacker\u2019s own socket operations.\nS:U - This is a standard in-kernel memory-safety flaw affecting the host kernel authority, with no VM/IOMMU/sandbox boundary crossing.\nC:H - The vulnerability is a use-after-free on j1939_priv refcounting; UAF enables reclaim/spray of the freed object and arbitrary kernel memory disclosure.\nI:H - Use-after-free of j1939_priv state enables heap manipulation and write primitives sufficient for control-flow hijacking or arbitrary kernel writes.\nA:H - The UAF reliably produces refcount warnings and kernel oops/crash conditions even without full exploitation, denying availability."
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668"
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"url": "https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f"
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"url": "https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586"
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"title": "can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv",
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"cveId": "CVE-2021-47459",
"datePublished": "2024-05-22T06:23:21.061Z",
"dateReserved": "2024-05-22T06:20:56.197Z",
"dateUpdated": "2026-08-05T08:47:56.231Z",
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CVE-2021-47548 (GCVE-0-2021-47548)
Vulnerability from cvelistv5 – Published: 2024-05-24 15:09 – Updated: 2026-05-11 13:56
VLAI
EPSS
VEX
Title
ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()
Summary
In the Linux kernel, the following vulnerability has been resolved:
ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()
The if statement:
if (port >= DSAF_GE_NUM)
return;
limits the value of port less than DSAF_GE_NUM (i.e., 8).
However, if the value of port is 6 or 7, an array overflow could occur:
port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off;
because the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6).
To fix this possible array overflow, we first check port and if it is
greater than or equal to DSAF_MAX_PORT_NUM, the function returns.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-129 - Improper Validation of Array Index
Assigner
References
7 references
Impacted products
16 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
850bfa3b78ea8849fef78ed74f5f2ccf947db0ca , < 948968f8747650447c8f21c9fdba0e1973be040b
(git)
Affected: 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca , < abbd5faa0748d0aa95d5191d56ff7a17a6275bd1 (git) Affected: 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca , < dd07f8971b81ad98cc754b179b331b57f35aa1ff (git) Affected: 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca , < 99bb25cb6753beaf2c2bc37927c2ecc0ceff3f6d (git) Affected: 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca , < 22519eff7df2d88adcc2568d86046ce1e2b52803 (git) Affected: 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca , < fc7ffa7f10b9454a86369405d9814bf141b30627 (git) Affected: 850bfa3b78ea8849fef78ed74f5f2ccf947db0ca , < a66998e0fbf213d47d02813b9679426129d0d114 (git) |
|
| Linux | Linux |
Affected:
4.7
Unaffected: 0 , < 4.7 (semver) Unaffected: 4.9.292 , ≤ 4.9.* (semver) Unaffected: 4.14.257 , ≤ 4.14.* (semver) Unaffected: 4.19.220 , ≤ 4.19.* (semver) Unaffected: 5.4.164 , ≤ 5.4.* (semver) Unaffected: 5.10.84 , ≤ 5.10.* (semver) Unaffected: 5.15.7 , ≤ 5.15.* (semver) Unaffected: 5.16 , ≤ * (original_commit_for_fix) |
|
| linux | linux_kernel |
Affected:
1da177e4c3f4 , < 948968f87476
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Affected:
1da177e4c3f4 , < abbd5faa0748
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Affected:
1da177e4c3f4 , < dd07f8971b81
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Affected:
1da177e4c3f4 , < 99bb25cb6753
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Affected:
1da177e4c3f4 , < 22519eff7df2
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Affected:
1da177e4c3f4 , < fc7ffa7f10b9
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Affected:
1da177e4c3f4 , < a66998e0fbf2
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Unaffected:
4.9.292 , ≤ 4.9.*
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Unaffected:
4.14.257 , ≤ 4.14*
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Unaffected:
4.19.220 , ≤ 4.19.*
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Unaffected:
5.4.164 , ≤ 5.4.*
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Unaffected:
5.10.84 , ≤ 5.10.*
(custom)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Unaffected:
5.15.7 , ≤ 5.15.*
(custom)
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
|
| linux | linux_kernel |
Unaffected:
5.16
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* |
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CVE-2022-48743 (GCVE-0-2022-48743)
Vulnerability from cvelistv5 – Published: 2024-06-20 11:13 – Updated: 2026-08-05 08:52
VLAI
EPSS
VEX
Title
net: amd-xgbe: Fix skb data length underflow
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: amd-xgbe: Fix skb data length underflow
There will be BUG_ON() triggered in include/linux/skbuff.h leading to
intermittent kernel panic, when the skb length underflow is detected.
Fix this by dropping the packet if such length underflows are seen
because of inconsistencies in the hardware descriptors.
Severity
8.1 (High)
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
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|
| Linux | Linux |
Affected:
4.11
Unaffected: 0 , < 4.11 (semver) Unaffected: 4.9.300 , ≤ 4.9.* (semver) Unaffected: 4.14.265 , ≤ 4.14.* (semver) Unaffected: 4.19.228 , ≤ 4.19.* (semver) Unaffected: 5.4.177 , ≤ 5.4.* (semver) Unaffected: 5.10.97 , ≤ 5.10.* (semver) Unaffected: 5.15.20 , ≤ 5.15.* (semver) Unaffected: 5.16.6 , ≤ 5.16.* (semver) Unaffected: 5.17 , ≤ * (original_commit_for_fix) |
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CVE-2023-52458 (GCVE-0-2023-52458)
Vulnerability from cvelistv5 – Published: 2024-02-23 14:46 – Updated: 2026-05-12 11:21
VLAI
EPSS
VEX
Title
block: add check that partition length needs to be aligned with block size
Summary
In the Linux kernel, the following vulnerability has been resolved:
block: add check that partition length needs to be aligned with block size
Before calling add partition or resize partition, there is no check
on whether the length is aligned with the logical block size.
If the logical block size of the disk is larger than 512 bytes,
then the partition size maybe not the multiple of the logical block size,
and when the last sector is read, bio_truncate() will adjust the bio size,
resulting in an IO error if the size of the read command is smaller than
the logical block size.If integrity data is supported, this will also
result in a null pointer dereference when calling bio_integrity_free.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
8 references
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
633395b67bb222f85bb8f825c7751a54b9ec84ee , < 8f6dfa1f1efe6dcca2d43e575491d8fcbe922f62
(git)
Affected: 633395b67bb222f85bb8f825c7751a54b9ec84ee , < 5010c27120962c85d2f421d2cf211791c9603503 (git) Affected: 633395b67bb222f85bb8f825c7751a54b9ec84ee , < ef31cc87794731ffcb578a195a2c47d744e25fb8 (git) Affected: 633395b67bb222f85bb8f825c7751a54b9ec84ee , < cb16cc1abda18a9514106d2ac8c8d7abc0be5ed8 (git) Affected: 633395b67bb222f85bb8f825c7751a54b9ec84ee , < bcdc288e7bc008daf38ef0401b53e4a8bb61bbe5 (git) Affected: 633395b67bb222f85bb8f825c7751a54b9ec84ee , < 6f64f866aa1ae6975c95d805ed51d7e9433a0016 (git) |
|
| Linux | Linux |
Affected:
4.10
Unaffected: 0 , < 4.10 (semver) Unaffected: 5.10.215 , ≤ 5.10.* (semver) Unaffected: 5.15.148 , ≤ 5.15.* (semver) Unaffected: 6.1.75 , ≤ 6.1.* (semver) Unaffected: 6.6.14 , ≤ 6.6.* (semver) Unaffected: 6.7.2 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix) |
|
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem |
Affected:
0 , < *
(custom)
|
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CVE-2023-52667 (GCVE-0-2023-52667)
Vulnerability from cvelistv5 – Published: 2024-05-17 14:01 – Updated: 2026-08-05 09:10
VLAI
EPSS
VEX
Title
net/mlx5e: fix a potential double-free in fs_any_create_groups
Summary
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: fix a potential double-free in fs_any_create_groups
When kcalloc() for ft->g succeeds but kvzalloc() for in fails,
fs_any_create_groups() will free ft->g. However, its caller
fs_any_create_table() will free ft->g again through calling
mlx5e_destroy_flow_table(), which will lead to a double-free.
Fix this by setting ft->g to NULL in fs_any_create_groups().
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 , < 72a729868592752b5a294d27453da264106983b1
(git)
Affected: 0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 , < b2fa86b2aceb4bc9ada51cea90f61546d7512cbe (git) Affected: 0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 , < 2897c981ee63e1be5e530b1042484626a10b26d8 (git) Affected: 0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 , < 65a4ade8a6d205979292e88beeb6a626ddbd4779 (git) Affected: 0f575c20bf0686caf3d82d6c626c2e1e4a4c36e6 , < aef855df7e1bbd5aa4484851561211500b22707e (git) |
|
| Linux | Linux |
Affected:
5.13
Unaffected: 0 , < 5.13 (semver) Unaffected: 5.15.149 , ≤ 5.15.* (semver) Unaffected: 6.1.76 , ≤ 6.1.* (semver) Unaffected: 6.6.15 , ≤ 6.6.* (semver) Unaffected: 6.7.3 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix) |
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CVE-2023-52784 (GCVE-0-2023-52784)
Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-05-11 19:33
VLAI
EPSS
VEX
Title
bonding: stop the device in bond_setup_by_slave()
Summary
In the Linux kernel, the following vulnerability has been resolved:
bonding: stop the device in bond_setup_by_slave()
Commit 9eed321cde22 ("net: lapbether: only support ethernet devices")
has been able to keep syzbot away from net/lapb, until today.
In the following splat [1], the issue is that a lapbether device has
been created on a bonding device without members. Then adding a non
ARPHRD_ETHER member forced the bonding master to change its type.
The fix is to make sure we call dev_close() in bond_setup_by_slave()
so that the potential linked lapbether devices (or any other devices
having assumptions on the physical device) are removed.
A similar bug has been addressed in commit 40baec225765
("bonding: fix panic on non-ARPHRD_ETHER enslave failure")
[1]
skbuff: skb_under_panic: text:ffff800089508810 len:44 put:40 head:ffff0000c78e7c00 data:ffff0000c78e7bea tail:0x16 end:0x140 dev:bond0
kernel BUG at net/core/skbuff.c:192 !
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 6007 Comm: syz-executor383 Not tainted 6.6.0-rc3-syzkaller-gbf6547d8715b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : skb_panic net/core/skbuff.c:188 [inline]
pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:202
lr : skb_panic net/core/skbuff.c:188 [inline]
lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:202
sp : ffff800096a06aa0
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x26: ffff0000ce9b9b50 x25: 0000000000000016 x24: ffff0000c78e7bea
x23: ffff0000c78e7c00 x22: 000000000000002c x21: 0000000000000140
x20: 0000000000000028 x19: ffff800089508810 x18: ffff800096a06100
x17: 0000000000000000 x16: ffff80008a629a3c x15: 0000000000000001
x14: 1fffe00036837a32 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000201 x10: 0000000000000000 x9 : cb50b496c519aa00
x8 : cb50b496c519aa00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800096a063b8 x4 : ffff80008e280f80 x3 : ffff8000805ad11c
x2 : 0000000000000001 x1 : 0000000100000201 x0 : 0000000000000086
Call trace:
skb_panic net/core/skbuff.c:188 [inline]
skb_under_panic+0x13c/0x140 net/core/skbuff.c:202
skb_push+0xf0/0x108 net/core/skbuff.c:2446
ip6gre_header+0xbc/0x738 net/ipv6/ip6_gre.c:1384
dev_hard_header include/linux/netdevice.h:3136 [inline]
lapbeth_data_transmit+0x1c4/0x298 drivers/net/wan/lapbether.c:257
lapb_data_transmit+0x8c/0xb0 net/lapb/lapb_iface.c:447
lapb_transmit_buffer+0x178/0x204 net/lapb/lapb_out.c:149
lapb_send_control+0x220/0x320 net/lapb/lapb_subr.c:251
__lapb_disconnect_request+0x9c/0x17c net/lapb/lapb_iface.c:326
lapb_device_event+0x288/0x4e0 net/lapb/lapb_iface.c:492
notifier_call_chain+0x1a4/0x510 kernel/notifier.c:93
raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:461
call_netdevice_notifiers_info net/core/dev.c:1970 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2008 [inline]
call_netdevice_notifiers net/core/dev.c:2022 [inline]
__dev_close_many+0x1b8/0x3c4 net/core/dev.c:1508
dev_close_many+0x1e0/0x470 net/core/dev.c:1559
dev_close+0x174/0x250 net/core/dev.c:1585
lapbeth_device_event+0x2e4/0x958 drivers/net/wan/lapbether.c:466
notifier_call_chain+0x1a4/0x510 kernel/notifier.c:93
raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:461
call_netdevice_notifiers_info net/core/dev.c:1970 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2008 [inline]
call_netdevice_notifiers net/core/dev.c:2022 [inline]
__dev_close_many+0x1b8/0x3c4 net/core/dev.c:1508
dev_close_many+0x1e0/0x470 net/core/dev.c:1559
dev_close+0x174/0x250 net/core/dev.c:1585
bond_enslave+0x2298/0x30cc drivers/net/bonding/bond_main.c:2332
bond_do_ioctl+0x268/0xc64 drivers/net/bonding/bond_main.c:4539
dev_ifsioc+0x754/0x9ac
dev_ioctl+0x4d8/0xd34 net/core/dev_ioctl.c:786
sock_do_ioctl+0x1d4/0x2d0 net/socket.c:1217
sock_ioctl+0x4e8/0x834 net/socket.c:1322
vfs_ioctl fs/ioctl.c:51 [inline]
__do_
---truncated---
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
872254dd6b1f80cb95ee9e2e22980888533fc293 , < b4f0e605a508f6d7cda6df2f03a0c676b778b1fe
(git)
Affected: 872254dd6b1f80cb95ee9e2e22980888533fc293 , < 396baca6683f415b5bc2b380289387bef1406edc (git) Affected: 872254dd6b1f80cb95ee9e2e22980888533fc293 , < 53064e8239dd2ecfefc5634e991f1025abc2ee0c (git) Affected: 872254dd6b1f80cb95ee9e2e22980888533fc293 , < 19554aa901b5833787df4417a05ccdebf351b7f4 (git) Affected: 872254dd6b1f80cb95ee9e2e22980888533fc293 , < 87c49806a37f88eddde3f537c162fd0c2834170c (git) Affected: 872254dd6b1f80cb95ee9e2e22980888533fc293 , < d98c91215a5748a0f536e7ccea26027005196859 (git) Affected: 872254dd6b1f80cb95ee9e2e22980888533fc293 , < 3cffa2ddc4d3fcf70cde361236f5a614f81a09b2 (git) |
|
| Linux | Linux |
Affected:
2.6.24
Unaffected: 0 , < 2.6.24 (semver) Unaffected: 5.4.262 , ≤ 5.4.* (semver) Unaffected: 5.10.202 , ≤ 5.10.* (semver) Unaffected: 5.15.140 , ≤ 5.15.* (semver) Unaffected: 6.1.64 , ≤ 6.1.* (semver) Unaffected: 6.5.13 , ≤ 6.5.* (semver) Unaffected: 6.6.3 , ≤ 6.6.* (semver) Unaffected: 6.7 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: stop the device in bond_setup_by_slave()\n\nCommit 9eed321cde22 (\"net: lapbether: only support ethernet devices\")\nhas been able to keep syzbot away from net/lapb, until today.\n\nIn the following splat [1], the issue is that a lapbether device has\nbeen created on a bonding device without members. Then adding a non\nARPHRD_ETHER member forced the bonding master to change its type.\n\nThe fix is to make sure we call dev_close() in bond_setup_by_slave()\nso that the potential linked lapbether devices (or any other devices\nhaving assumptions on the physical device) are removed.\n\nA similar bug has been addressed in commit 40baec225765\n(\"bonding: fix panic on non-ARPHRD_ETHER enslave failure\")\n\n[1]\nskbuff: skb_under_panic: text:ffff800089508810 len:44 put:40 head:ffff0000c78e7c00 data:ffff0000c78e7bea tail:0x16 end:0x140 dev:bond0\nkernel BUG at net/core/skbuff.c:192 !\nInternal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\nModules linked in:\nCPU: 0 PID: 6007 Comm: syz-executor383 Not tainted 6.6.0-rc3-syzkaller-gbf6547d8715b #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023\npstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : skb_panic net/core/skbuff.c:188 [inline]\npc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:202\nlr : skb_panic net/core/skbuff.c:188 [inline]\nlr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:202\nsp : ffff800096a06aa0\nx29: ffff800096a06ab0 x28: ffff800096a06ba0 x27: dfff800000000000\nx26: ffff0000ce9b9b50 x25: 0000000000000016 x24: ffff0000c78e7bea\nx23: ffff0000c78e7c00 x22: 000000000000002c x21: 0000000000000140\nx20: 0000000000000028 x19: ffff800089508810 x18: ffff800096a06100\nx17: 0000000000000000 x16: ffff80008a629a3c x15: 0000000000000001\nx14: 1fffe00036837a32 x13: 0000000000000000 x12: 0000000000000000\nx11: 0000000000000201 x10: 0000000000000000 x9 : cb50b496c519aa00\nx8 : cb50b496c519aa00 x7 : 0000000000000001 x6 : 0000000000000001\nx5 : ffff800096a063b8 x4 : ffff80008e280f80 x3 : ffff8000805ad11c\nx2 : 0000000000000001 x1 : 0000000100000201 x0 : 0000000000000086\nCall trace:\nskb_panic net/core/skbuff.c:188 [inline]\nskb_under_panic+0x13c/0x140 net/core/skbuff.c:202\nskb_push+0xf0/0x108 net/core/skbuff.c:2446\nip6gre_header+0xbc/0x738 net/ipv6/ip6_gre.c:1384\ndev_hard_header include/linux/netdevice.h:3136 [inline]\nlapbeth_data_transmit+0x1c4/0x298 drivers/net/wan/lapbether.c:257\nlapb_data_transmit+0x8c/0xb0 net/lapb/lapb_iface.c:447\nlapb_transmit_buffer+0x178/0x204 net/lapb/lapb_out.c:149\nlapb_send_control+0x220/0x320 net/lapb/lapb_subr.c:251\n__lapb_disconnect_request+0x9c/0x17c net/lapb/lapb_iface.c:326\nlapb_device_event+0x288/0x4e0 net/lapb/lapb_iface.c:492\nnotifier_call_chain+0x1a4/0x510 kernel/notifier.c:93\nraw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:461\ncall_netdevice_notifiers_info net/core/dev.c:1970 [inline]\ncall_netdevice_notifiers_extack net/core/dev.c:2008 [inline]\ncall_netdevice_notifiers net/core/dev.c:2022 [inline]\n__dev_close_many+0x1b8/0x3c4 net/core/dev.c:1508\ndev_close_many+0x1e0/0x470 net/core/dev.c:1559\ndev_close+0x174/0x250 net/core/dev.c:1585\nlapbeth_device_event+0x2e4/0x958 drivers/net/wan/lapbether.c:466\nnotifier_call_chain+0x1a4/0x510 kernel/notifier.c:93\nraw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:461\ncall_netdevice_notifiers_info net/core/dev.c:1970 [inline]\ncall_netdevice_notifiers_extack net/core/dev.c:2008 [inline]\ncall_netdevice_notifiers net/core/dev.c:2022 [inline]\n__dev_close_many+0x1b8/0x3c4 net/core/dev.c:1508\ndev_close_many+0x1e0/0x470 net/core/dev.c:1559\ndev_close+0x174/0x250 net/core/dev.c:1585\nbond_enslave+0x2298/0x30cc drivers/net/bonding/bond_main.c:2332\nbond_do_ioctl+0x268/0xc64 drivers/net/bonding/bond_main.c:4539\ndev_ifsioc+0x754/0x9ac\ndev_ioctl+0x4d8/0xd34 net/core/dev_ioctl.c:786\nsock_do_ioctl+0x1d4/0x2d0 net/socket.c:1217\nsock_ioctl+0x4e8/0x834 net/socket.c:1322\nvfs_ioctl fs/ioctl.c:51 [inline]\n__do_\n---truncated---"
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CVE-2023-52809 (GCVE-0-2023-52809)
Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-05-11 19:33
VLAI
EPSS
VEX
Title
scsi: libfc: Fix potential NULL pointer dereference in fc_lport_ptp_setup()
Summary
In the Linux kernel, the following vulnerability has been resolved:
scsi: libfc: Fix potential NULL pointer dereference in fc_lport_ptp_setup()
fc_lport_ptp_setup() did not check the return value of fc_rport_create()
which can return NULL and would cause a NULL pointer dereference. Address
this issue by checking return value of fc_rport_create() and log error
message on fc_rport_create() failed.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
9 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 930f0aaba4820d6362de4e6ed569eaf444f1ea4e
(git)
Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 77072ec41d6ab3718c3fc639bc149b8037caedfa (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < b549acf999824d4f751ca57965700372f2f3ad00 (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < bb83f79f90e92f46466adcfd4fd264a7ae0f0f01 (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 56d78b5495ebecbb9395101f3be177cd0a52450b (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 442fd24d7b6b29e4a9cd9225afba4142d5f522ba (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < f6fe7261b92b21109678747f36df9fdab1e30c34 (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 6b9ecf4e1032e645873933e5b43cbb84cac19106 (git) Affected: 42e9a92fe6a9095bd68a379aaec7ad2be0337f7a , < 4df105f0ce9f6f30cda4e99f577150d23f0c9c5f (git) |
|
| Linux | Linux |
Affected:
2.6.29
Unaffected: 0 , < 2.6.29 (semver) Unaffected: 4.14.331 , ≤ 4.14.* (semver) Unaffected: 4.19.300 , ≤ 4.19.* (semver) Unaffected: 5.4.262 , ≤ 5.4.* (semver) Unaffected: 5.10.202 , ≤ 5.10.* (semver) Unaffected: 5.15.140 , ≤ 5.15.* (semver) Unaffected: 6.1.64 , ≤ 6.1.* (semver) Unaffected: 6.5.13 , ≤ 6.5.* (semver) Unaffected: 6.6.3 , ≤ 6.6.* (semver) Unaffected: 6.7 , ≤ * (original_commit_for_fix) |
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CVE-2024-26733 (GCVE-0-2024-26733)
Vulnerability from cvelistv5 – Published: 2024-04-03 17:00 – Updated: 2026-05-11 20:03
VLAI
EPSS
VEX
Title
arp: Prevent overflow in arp_req_get().
Summary
In the Linux kernel, the following vulnerability has been resolved:
arp: Prevent overflow in arp_req_get().
syzkaller reported an overflown write in arp_req_get(). [0]
When ioctl(SIOCGARP) is issued, arp_req_get() looks up an neighbour
entry and copies neigh->ha to struct arpreq.arp_ha.sa_data.
The arp_ha here is struct sockaddr, not struct sockaddr_storage, so
the sa_data buffer is just 14 bytes.
In the splat below, 2 bytes are overflown to the next int field,
arp_flags. We initialise the field just after the memcpy(), so it's
not a problem.
However, when dev->addr_len is greater than 22 (e.g. MAX_ADDR_LEN),
arp_netmask is overwritten, which could be set as htonl(0xFFFFFFFFUL)
in arp_ioctl() before calling arp_req_get().
To avoid the overflow, let's limit the max length of memcpy().
Note that commit b5f0de6df6dc ("net: dev: Convert sa_data to flexible
array in struct sockaddr") just silenced syzkaller.
[0]:
memcpy: detected field-spanning write (size 16) of single field "r->arp_ha.sa_data" at net/ipv4/arp.c:1128 (size 14)
WARNING: CPU: 0 PID: 144638 at net/ipv4/arp.c:1128 arp_req_get+0x411/0x4a0 net/ipv4/arp.c:1128
Modules linked in:
CPU: 0 PID: 144638 Comm: syz-executor.4 Not tainted 6.1.74 #31
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-5 04/01/2014
RIP: 0010:arp_req_get+0x411/0x4a0 net/ipv4/arp.c:1128
Code: fd ff ff e8 41 42 de fb b9 0e 00 00 00 4c 89 fe 48 c7 c2 20 6d ab 87 48 c7 c7 80 6d ab 87 c6 05 25 af 72 04 01 e8 5f 8d ad fb <0f> 0b e9 6c fd ff ff e8 13 42 de fb be 03 00 00 00 4c 89 e7 e8 a6
RSP: 0018:ffffc900050b7998 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88803a815000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8641a44a RDI: 0000000000000001
RBP: ffffc900050b7a98 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 203a7970636d656d R12: ffff888039c54000
R13: 1ffff92000a16f37 R14: ffff88803a815084 R15: 0000000000000010
FS: 00007f172bf306c0(0000) GS:ffff88805aa00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f172b3569f0 CR3: 0000000057f12005 CR4: 0000000000770ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
<TASK>
arp_ioctl+0x33f/0x4b0 net/ipv4/arp.c:1261
inet_ioctl+0x314/0x3a0 net/ipv4/af_inet.c:981
sock_do_ioctl+0xdf/0x260 net/socket.c:1204
sock_ioctl+0x3ef/0x650 net/socket.c:1321
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x18e/0x220 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x37/0x90 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x64/0xce
RIP: 0033:0x7f172b262b8d
Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f172bf300b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f172b3abf80 RCX: 00007f172b262b8d
RDX: 0000000020000000 RSI: 0000000000008954 RDI: 0000000000000003
RBP: 00007f172b2d3493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f172b3abf80 R15: 00007f172bf10000
</TASK>
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < dbc9b22d0ed319b4e29034ce0a3fe32a3ee2c587
(git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 97eaa2955db4120ce6ec2ef123e860bc32232c50 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f119f2325ba70cbfdec701000dcad4d88805d5b0 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a3f2c083cb575d80a7627baf3339e78fedccbb91 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3ab0d6f8289ba8402ca95a9fc61a34909d5e1f3a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a7d6027790acea24446ddd6632d394096c0f4667 (git) |
|
| Linux | Linux |
Affected:
2.6.12
Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.211 , ≤ 5.10.* (semver) Unaffected: 5.15.150 , ≤ 5.15.* (semver) Unaffected: 6.1.80 , ≤ 6.1.* (semver) Unaffected: 6.6.19 , ≤ 6.6.* (semver) Unaffected: 6.7.7 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\narp: Prevent overflow in arp_req_get().\n\nsyzkaller reported an overflown write in arp_req_get(). [0]\n\nWhen ioctl(SIOCGARP) is issued, arp_req_get() looks up an neighbour\nentry and copies neigh-\u003eha to struct arpreq.arp_ha.sa_data.\n\nThe arp_ha here is struct sockaddr, not struct sockaddr_storage, so\nthe sa_data buffer is just 14 bytes.\n\nIn the splat below, 2 bytes are overflown to the next int field,\narp_flags. We initialise the field just after the memcpy(), so it\u0027s\nnot a problem.\n\nHowever, when dev-\u003eaddr_len is greater than 22 (e.g. MAX_ADDR_LEN),\narp_netmask is overwritten, which could be set as htonl(0xFFFFFFFFUL)\nin arp_ioctl() before calling arp_req_get().\n\nTo avoid the overflow, let\u0027s limit the max length of memcpy().\n\nNote that commit b5f0de6df6dc (\"net: dev: Convert sa_data to flexible\narray in struct sockaddr\") just silenced syzkaller.\n\n[0]:\nmemcpy: detected field-spanning write (size 16) of single field \"r-\u003earp_ha.sa_data\" at net/ipv4/arp.c:1128 (size 14)\nWARNING: CPU: 0 PID: 144638 at net/ipv4/arp.c:1128 arp_req_get+0x411/0x4a0 net/ipv4/arp.c:1128\nModules linked in:\nCPU: 0 PID: 144638 Comm: syz-executor.4 Not tainted 6.1.74 #31\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-5 04/01/2014\nRIP: 0010:arp_req_get+0x411/0x4a0 net/ipv4/arp.c:1128\nCode: fd ff ff e8 41 42 de fb b9 0e 00 00 00 4c 89 fe 48 c7 c2 20 6d ab 87 48 c7 c7 80 6d ab 87 c6 05 25 af 72 04 01 e8 5f 8d ad fb \u003c0f\u003e 0b e9 6c fd ff ff e8 13 42 de fb be 03 00 00 00 4c 89 e7 e8 a6\nRSP: 0018:ffffc900050b7998 EFLAGS: 00010286\nRAX: 0000000000000000 RBX: ffff88803a815000 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: ffffffff8641a44a RDI: 0000000000000001\nRBP: ffffc900050b7a98 R08: 0000000000000001 R09: 0000000000000000\nR10: 0000000000000000 R11: 203a7970636d656d R12: ffff888039c54000\nR13: 1ffff92000a16f37 R14: ffff88803a815084 R15: 0000000000000010\nFS: 00007f172bf306c0(0000) GS:ffff88805aa00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f172b3569f0 CR3: 0000000057f12005 CR4: 0000000000770ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n \u003cTASK\u003e\n arp_ioctl+0x33f/0x4b0 net/ipv4/arp.c:1261\n inet_ioctl+0x314/0x3a0 net/ipv4/af_inet.c:981\n sock_do_ioctl+0xdf/0x260 net/socket.c:1204\n sock_ioctl+0x3ef/0x650 net/socket.c:1321\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:870 [inline]\n __se_sys_ioctl fs/ioctl.c:856 [inline]\n __x64_sys_ioctl+0x18e/0x220 fs/ioctl.c:856\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x37/0x90 arch/x86/entry/common.c:81\n entry_SYSCALL_64_after_hwframe+0x64/0xce\nRIP: 0033:0x7f172b262b8d\nCode: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f172bf300b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 00007f172b3abf80 RCX: 00007f172b262b8d\nRDX: 0000000020000000 RSI: 0000000000008954 RDI: 0000000000000003\nRBP: 00007f172b2d3493 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 000000000000000b R14: 00007f172b3abf80 R15: 00007f172bf10000\n \u003c/TASK\u003e"
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CVE-2024-26737 (GCVE-0-2024-26737)
Vulnerability from cvelistv5 – Published: 2024-04-03 17:00 – Updated: 2026-08-05 11:26
VLAI
EPSS
VEX
Title
bpf: Fix racing between bpf_timer_cancel_and_free and bpf_timer_cancel
Summary
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix racing between bpf_timer_cancel_and_free and bpf_timer_cancel
The following race is possible between bpf_timer_cancel_and_free
and bpf_timer_cancel. It will lead a UAF on the timer->timer.
bpf_timer_cancel();
spin_lock();
t = timer->time;
spin_unlock();
bpf_timer_cancel_and_free();
spin_lock();
t = timer->timer;
timer->timer = NULL;
spin_unlock();
hrtimer_cancel(&t->timer);
kfree(t);
/* UAF on t */
hrtimer_cancel(&t->timer);
In bpf_timer_cancel_and_free, this patch frees the timer->timer
after a rcu grace period. This requires a rcu_head addition
to the "struct bpf_hrtimer". Another kfree(t) happens in bpf_timer_init,
this does not need a kfree_rcu because it is still under the
spin_lock and timer->timer has not been visible by others yet.
In bpf_timer_cancel, rcu_read_lock() is added because this helper
can be used in a non rcu critical section context (e.g. from
a sleepable bpf prog). Other timer->timer usages in helpers.c
have been audited, bpf_timer_cancel() is the only place where
timer->timer is used outside of the spin_lock.
Another solution considered is to mark a t->flag in bpf_timer_cancel
and clear it after hrtimer_cancel() is done. In bpf_timer_cancel_and_free,
it busy waits for the flag to be cleared before kfree(t). This patch
goes with a straight forward solution and frees timer->timer after
a rcu grace period.
Severity
7.8 (High)
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
b00628b1c7d595ae5b544e059c27b1f5828314b4 , < 5268bb02107b9eedfdcd51db75b407d10043368c
(git)
Affected: b00628b1c7d595ae5b544e059c27b1f5828314b4 , < addf5e297e6cbf5341f9c07720693ca9ba0057b5 (git) Affected: b00628b1c7d595ae5b544e059c27b1f5828314b4 , < 8327ed12e8ebc5436bfaa1786c49988894f9c8a6 (git) Affected: b00628b1c7d595ae5b544e059c27b1f5828314b4 , < 7d80a9e745fa5b47da3bca001f186c02485c7c33 (git) Affected: b00628b1c7d595ae5b544e059c27b1f5828314b4 , < 0281b919e175bb9c3128bd3872ac2903e9436e3f (git) |
|
| Linux | Linux |
Affected:
5.15
Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.150 , ≤ 5.15.* (semver) Unaffected: 6.1.80 , ≤ 6.1.* (semver) Unaffected: 6.6.19 , ≤ 6.6.* (semver) Unaffected: 6.7.7 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix racing between bpf_timer_cancel_and_free and bpf_timer_cancel\n\nThe following race is possible between bpf_timer_cancel_and_free\nand bpf_timer_cancel. It will lead a UAF on the timer-\u003etimer.\n\nbpf_timer_cancel();\n\tspin_lock();\n\tt = timer-\u003etime;\n\tspin_unlock();\n\n\t\t\t\t\tbpf_timer_cancel_and_free();\n\t\t\t\t\t\tspin_lock();\n\t\t\t\t\t\tt = timer-\u003etimer;\n\t\t\t\t\t\ttimer-\u003etimer = NULL;\n\t\t\t\t\t\tspin_unlock();\n\t\t\t\t\t\thrtimer_cancel(\u0026t-\u003etimer);\n\t\t\t\t\t\tkfree(t);\n\n\t/* UAF on t */\n\thrtimer_cancel(\u0026t-\u003etimer);\n\nIn bpf_timer_cancel_and_free, this patch frees the timer-\u003etimer\nafter a rcu grace period. This requires a rcu_head addition\nto the \"struct bpf_hrtimer\". Another kfree(t) happens in bpf_timer_init,\nthis does not need a kfree_rcu because it is still under the\nspin_lock and timer-\u003etimer has not been visible by others yet.\n\nIn bpf_timer_cancel, rcu_read_lock() is added because this helper\ncan be used in a non rcu critical section context (e.g. from\na sleepable bpf prog). Other timer-\u003etimer usages in helpers.c\nhave been audited, bpf_timer_cancel() is the only place where\ntimer-\u003etimer is used outside of the spin_lock.\n\nAnother solution considered is to mark a t-\u003eflag in bpf_timer_cancel\nand clear it after hrtimer_cancel() is done. In bpf_timer_cancel_and_free,\nit busy waits for the flag to be cleared before kfree(t). This patch\ngoes with a straight forward solution and frees timer-\u003etimer after\na rcu grace period."
}
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"value": "AV:L - Both sides of the race are driven through local syscalls \u2014 `bpf(BPF_PROG_LOAD)`/`BPF_PROG_TEST_RUN` to run a program calling `bpf_timer_cancel()`, and `BPF_MAP_DELETE_ELEM`/`close()` to drive `bpf_timer_cancel_and_free()`. No remotely supplied data reaches `kernel/bpf/helpers.c`, and BPF is classified as a local attack vector under kernel scoring guidance.\nAC:L - The attacker owns both racers \u2014 one thread runs its own BPF program calling `bpf_timer_cancel()` while another deletes the map element or drops the map uref \u2014 and can widen the window arbitrarily by making its own timer callback long-running, since `hrtimer_cancel()` blocks in `hrtimer_cancel_wait_running()` while the other thread finishes and `kfree()`s `t`. Nothing depends on state outside the attacker\u0027s control and the sequence can be retried in a tight loop.\nPR:L - The `bpf_timer_*` helpers are gated on `bpf_capable()` (CAP_BPF/CAP_SYS_ADMIN), a reduced non-root capability routinely delegated to unprivileged service, tracing and container workloads that are not init-namespace root. This matches this CNA\u0027s established scoring for the sibling `bpf_timer` UAFs CVE-2024-41045 and CVE-2024-42239.\nUI:N - The attacker loads its own program, arms its own timer, and issues both the cancel and the map-delete from its own threads. No victim action, mount, or interaction with any other principal is required.\nS:U - The freed `struct bpf_hrtimer` and the corrupted per-CPU hrtimer state are entirely kernel-internal, so the impact stays within the kernel\u0027s own security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - `hrtimer_active()` reads `timer-\u003ebase` out of the freed object and dereferences it (`base-\u003eseq`, `base-\u003erunning`), so reclaiming the 96-byte `kmalloc-cg-96` slot with sprayed data (e.g. `msg_msg`) turns this into an attacker-directed kernel-memory read, with the helper\u0027s return value acting as an oracle. That yields arbitrary kernel data disclosure and KASLR defeat.\nI:H - After `hrtimer_active()` returns true, `lock_hrtimer_base()` takes a spinlock at an attacker-controlled address and `remove_hrtimer()`/`__remove_hrtimer()` writes `timer-\u003estate`, performs `timerqueue_del()` rb-tree unlinking and clears bits in `cpu_base-\u003eactive_bases` through the same forged pointer. This is a controlled kernel write primitive suitable for privilege escalation.\nA:H - Even without a successful spray, operating on freed memory corrupts the per-CPU hrtimer queue and produces a KASAN splat, oops, or panic, and a garbage `timer-\u003ebase` sends `hrtimer_cancel()` into an unterminating retry loop. The attacker can trigger this at will, repeatedly."
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CVE-2024-26773 (GCVE-0-2024-26773)
Vulnerability from cvelistv5 – Published: 2024-04-03 17:00 – Updated: 2026-08-05 11:27
VLAI
EPSS
VEX
Title
ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()
Summary
In the Linux kernel, the following vulnerability has been resolved:
ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()
Determine if the group block bitmap is corrupted before using ac_b_ex in
ext4_mb_try_best_found() to avoid allocating blocks from a group with a
corrupted block bitmap in the following concurrency and making the
situation worse.
ext4_mb_regular_allocator
ext4_lock_group(sb, group)
ext4_mb_good_group
// check if the group bbitmap is corrupted
ext4_mb_complex_scan_group
// Scan group gets ac_b_ex but doesn't use it
ext4_unlock_group(sb, group)
ext4_mark_group_bitmap_corrupted(group)
// The block bitmap was corrupted during
// the group unlock gap.
ext4_mb_try_best_found
ext4_lock_group(ac->ac_sb, group)
ext4_mb_use_best_found
mb_mark_used
// Allocating blocks in block bitmap corrupted group
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
10 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 21f8cfe79f776287459343e9cfa6055af61328ea
(git)
Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 260fc96283c0f594de18a1b045faf6d8fb42874d (git) Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 927794a02169778c9c2e7b25c768ab3ea8c1dc03 (git) Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 4c21fa60a6f4606f6214a38f50612b17b2f738f5 (git) Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < f97e75fa4e12b0aa0224e83fcbda8853ac2adf36 (git) Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 0184747b552d6b5a14db3b7fcc3b792ce64dedd1 (git) Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < a2576ae9a35c078e488f2c573e9e6821d651fbbe (git) Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 4530b3660d396a646aad91a787b6ab37cf604b53 (git) |
|
| Linux | Linux |
Affected:
3.12
Unaffected: 0 , < 3.12 (semver) Unaffected: 4.19.308 , ≤ 4.19.* (semver) Unaffected: 5.4.270 , ≤ 5.4.* (semver) Unaffected: 5.10.211 , ≤ 5.10.* (semver) Unaffected: 5.15.150 , ≤ 5.15.* (semver) Unaffected: 6.1.80 , ≤ 6.1.* (semver) Unaffected: 6.6.19 , ≤ 6.6.* (semver) Unaffected: 6.7.7 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix) |
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"descriptions": [
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()\n\nDetermine if the group block bitmap is corrupted before using ac_b_ex in\next4_mb_try_best_found() to avoid allocating blocks from a group with a\ncorrupted block bitmap in the following concurrency and making the\nsituation worse.\n\next4_mb_regular_allocator\n ext4_lock_group(sb, group)\n ext4_mb_good_group\n // check if the group bbitmap is corrupted\n ext4_mb_complex_scan_group\n // Scan group gets ac_b_ex but doesn\u0027t use it\n ext4_unlock_group(sb, group)\n ext4_mark_group_bitmap_corrupted(group)\n // The block bitmap was corrupted during\n // the group unlock gap.\n ext4_mb_try_best_found\n ext4_lock_group(ac-\u003eac_sb, group)\n ext4_mb_use_best_found\n mb_mark_used\n // Allocating blocks in block bitmap corrupted group"
}
],
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"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"lang": "en",
"value": "AV:L - The vulnerable allocator is reached only through local filesystem operations (`write()`, `fallocate()`, truncate/extend) on a mounted ext4 filesystem via `ext4_mb_new_blocks()` \u2192 `ext4_mb_regular_allocator()`. No network protocol handler parses data that reaches this code directly.\nAC:L - The attacker drives both sides of the window \u2014 many concurrent writer threads on the same block group both create the allocation pressure that forces the `ac_b_ex.fe_len \u003e 0 \u0026\u0026 !AC_STATUS_FOUND` fallback into `ext4_mb_try_best_found()` and supply the concurrent free/scan that flags the group corrupt \u2014 and the same-thread path (corruption detected inside `ext4_mb_complex_scan_group()`, `break`, then the fallback allocation) needs no race at all; the sequence can be retried indefinitely at no cost.\nPR:L - Only an unprivileged local account with write access to any ext4 mount (`/tmp`, `/home`, an app data partition on Android/embedded) is needed; no capability, mount privilege, or fs-specific permission is consulted on the allocation path.\nUI:N - Once a group is flagged corrupt \u2014 by media aging on eMMC/flash in embedded and automotive deployments, by a prior detected double-free, or by the free-count mismatch the attacker\u0027s own concurrent allocation traffic provokes \u2014 exploitation is entirely the attacker\u0027s own syscalls, with no victim mount or file access required.\nS:U - The damaged resources are the ext4 block bitmap, buddy state, and file data, all managed by the same kernel security authority as the vulnerable code; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - Allocating from a group whose bitmap is known-inconsistent hands the attacker\u0027s file blocks that are still referenced by other inodes \u2014 the double-free detector\u0027s case is exactly \"this block is still owned by another file\" \u2014 so simply reading the attacker\u0027s own new file discloses other users\u0027 and system files\u0027 on-disk contents.\nI:H - The same double allocation lets attacker-controlled writes land on blocks belonging to other users\u0027 files and, where the bitmap accounting is wrong for metadata blocks, on ext4 metadata (inode table, bitmaps), corrupting foreign data and inode fields in a way that is leverageable for privilege escalation.\nA:H - Operating on the inconsistent buddy triggers `BUG_ON(ord \u003c= 0)` / `BUG_ON((start \u003e\u003e ord) \u003e= max)` in `mb_mark_used()`, `bb_free`/`bb_fragments` underflow feeding the divide-by-zero in `mb_update_avg_fragment_size()`, and `ext4_grp_locked_error()`, which forces the filesystem read-only by default and panics the kernel with `errors=panic`."
}
]
}
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"title": "ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()",
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2024-26773",
"datePublished": "2024-04-03T17:00:59.757Z",
"dateReserved": "2024-02-19T14:20:24.176Z",
"dateUpdated": "2026-08-05T11:27:10.867Z",
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}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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