Vulnerability-Lookup

alsa-2026:13565

Vulnerability from osv_almalinux

Published

2026-05-04 00:00

Modified

2026-05-07 00:12

Summary

Important: kernel security update

Details

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: Linux kernel: Denial of Service in libceph OSD client due to unreset sparse-read state (CVE-2026-23136)
kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270)
kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402)
kernel: crypto: algif_aead - Revert to operating out-of-place (CVE-2026-31431)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:13565	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-23136	REPORT
	https://access.redhat.com/security/cve/CVE-2026-23270	REPORT
	https://access.redhat.com/security/cve/CVE-2026-31402	REPORT
	https://access.redhat.com/security/cve/CVE-2026-31431	REPORT
	https://bugzilla.redhat.com/2439852	REPORT
	https://bugzilla.redhat.com/2448745	REPORT
	https://bugzilla.redhat.com/2454844	REPORT
	https://bugzilla.redhat.com/2460538	REPORT
	https://errata.almalinux.org/9/ALSA-2026-13565.html	ADVISORY

JSON

To clipboard

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  "details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.  \n\nSecurity Fix(es):  \n\n  * kernel: Linux kernel: Denial of Service in libceph OSD client due to unreset sparse-read state (CVE-2026-23136)\n  * kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270)\n  * kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402)\n  * kernel: crypto: algif_aead - Revert to operating out-of-place (CVE-2026-31431)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:13565",
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  "published": "2026-05-04T00:00:00Z",
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      "url": "https://access.redhat.com/errata/RHSA-2026:13565"
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    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-23136"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-23270"
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    {
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      "url": "https://access.redhat.com/security/cve/CVE-2026-31402"
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    {
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      "url": "https://access.redhat.com/security/cve/CVE-2026-31431"
    },
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      "url": "https://bugzilla.redhat.com/2439852"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2448745"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2454844"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2460538"
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      "url": "https://errata.almalinux.org/9/ALSA-2026-13565.html"
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  ],
  "related": [
    "CVE-2026-23136",
    "CVE-2026-23270",
    "CVE-2026-31402",
    "CVE-2026-31431"
  ],
  "summary": "Important: kernel security update"
}

CVE-2026-23270 (GCVE-0-2026-23270)

Vulnerability from cvelistv5 – Published: 2026-03-18 17:54 – Updated: 2026-04-18 08:57

Title

net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks

Summary

In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks As Paolo said earlier [1]: "Since the blamed commit below, classify can return TC_ACT_CONSUMED while the current skb being held by the defragmentation engine. As reported by GangMin Kim, if such packet is that may cause a UaF when the defrag engine later on tries to tuch again such packet." act_ct was never meant to be used in the egress path, however some users are attaching it to egress today [2]. Attempting to reach a middle ground, we noticed that, while most qdiscs are not handling TC_ACT_CONSUMED, clsact/ingress qdiscs are. With that in mind, we address the issue by only allowing act_ct to bind to clsact/ingress qdiscs and shared blocks. That way it's still possible to attach act_ct to egress (albeit only with clsact). [1] https://lore.kernel.org/netdev/674b8cbfc385c6f37fb29a1de08d8fe5c2b0fbee.1771321118.git.pabeni@redhat.com/ [2] https://lore.kernel.org/netdev/cc6bfb4a-4a2b-42d8-b9ce-7ef6644fb22b@ovn.org/

Severity ?

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/bc4e5bb529823a09f…
	https://git.kernel.org/stable/c/fb3c380a54e33d1fd…
	https://git.kernel.org/stable/c/5a110ddcc99bda77a…
	https://git.kernel.org/stable/c/524ce8b4ea8f64900…
	https://git.kernel.org/stable/c/380ad8b7c65ea7aa1…
	https://git.kernel.org/stable/c/9deda0fcda5c1f388…
	https://git.kernel.org/stable/c/11cb63b0d1a0685e0…

Impacted products

Vendor

Product

Version

Linux

Affected: 172ba7d46c202e679f3ccb10264c67416aaeb1c4 , < bc4e5bb529823a09f02dbe96169de679a9db26e0 (git)
Affected: 0b5b831122fc3789fff75be433ba3e4dd7b779d4 , < fb3c380a54e33d1fd272cc342faa906d787d7ef1 (git)
Affected: 73f7da5fd124f2cda9161e2e46114915e6e82e97 , < 5a110ddcc99bda77a28598b3555fe009eaab3828 (git)
Affected: 3f14b377d01d8357eba032b4cabc8c1149b458b6 , < 524ce8b4ea8f64900b6c52b6a28df74f6bc0801e (git)
Affected: 3f14b377d01d8357eba032b4cabc8c1149b458b6 , < 380ad8b7c65ea7aa10ef2258297079ed5ac1f5b6 (git)
Affected: 3f14b377d01d8357eba032b4cabc8c1149b458b6 , < 9deda0fcda5c1f388c5e279541850b71a2ccfcf4 (git)
Affected: 3f14b377d01d8357eba032b4cabc8c1149b458b6 , < 11cb63b0d1a0685e0831ae3c77223e002ef18189 (git)
Affected: f5346df0591d10bc948761ca854b1fae6d2ef441 (git)

Linux

Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.18 , ≤ 6.18.* (semver)
Unaffected: 6.19.8 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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CVE-2026-23136 (GCVE-0-2026-23136)

Vulnerability from cvelistv5 – Published: 2026-02-14 15:22 – Updated: 2026-04-03 13:32

Title

libceph: reset sparse-read state in osd_fault()

Summary

In the Linux kernel, the following vulnerability has been resolved: libceph: reset sparse-read state in osd_fault() When a fault occurs, the connection is abandoned, reestablished, and any pending operations are retried. The OSD client tracks the progress of a sparse-read reply using a separate state machine, largely independent of the messenger's state. If a connection is lost mid-payload or the sparse-read state machine returns an error, the sparse-read state is not reset. The OSD client will then interpret the beginning of a new reply as the continuation of the old one. If this makes the sparse-read machinery enter a failure state, it may never recover, producing loops like: libceph: [0] got 0 extents libceph: data len 142248331 != extent len 0 libceph: osd0 (1)...:6801 socket error on read libceph: data len 142248331 != extent len 0 libceph: osd0 (1)...:6801 socket error on read Therefore, reset the sparse-read state in osd_fault(), ensuring retries start from a clean state.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/90a60fe61908afa0e…
	https://git.kernel.org/stable/c/e94075e950a6598e7…
	https://git.kernel.org/stable/c/10b7c72810364226f…
	https://git.kernel.org/stable/c/11194b416ef95012c…

Impacted products

Vendor

Product

Version

Linux

Affected: f628d799972799023d32c2542bb2639eb8c4f84e , < 90a60fe61908afa0eaf7f8fcf1421b9b50e5f7ff (git)
Affected: f628d799972799023d32c2542bb2639eb8c4f84e , < e94075e950a6598e710b9f7dffea5aa388f40313 (git)
Affected: f628d799972799023d32c2542bb2639eb8c4f84e , < 10b7c72810364226f7b27916ea3e2a4f870bc04b (git)
Affected: f628d799972799023d32c2542bb2639eb8c4f84e , < 11194b416ef95012c2cfe5f546d71af07b639e93 (git)

Linux

Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.121 , ≤ 6.6.* (semver)
Unaffected: 6.12.66 , ≤ 6.12.* (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ceph/osd_client.c"
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CVE-2026-31402 (GCVE-0-2026-31402)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:16 – Updated: 2026-04-27 14:02

Title

nfsd: fix heap overflow in NFSv4.0 LOCK replay cache

Summary

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache The NFSv4.0 replay cache uses a fixed 112-byte inline buffer (rp_ibuf[NFSD4_REPLAY_ISIZE]) to store encoded operation responses. This size was calculated based on OPEN responses and does not account for LOCK denied responses, which include the conflicting lock owner as a variable-length field up to 1024 bytes (NFS4_OPAQUE_LIMIT). When a LOCK operation is denied due to a conflict with an existing lock that has a large owner, nfsd4_encode_operation() copies the full encoded response into the undersized replay buffer via read_bytes_from_xdr_buf() with no bounds check. This results in a slab-out-of-bounds write of up to 944 bytes past the end of the buffer, corrupting adjacent heap memory. This can be triggered remotely by an unauthenticated attacker with two cooperating NFSv4.0 clients: one sets a lock with a large owner string, then the other requests a conflicting lock to provoke the denial. We could fix this by increasing NFSD4_REPLAY_ISIZE to allow for a full opaque, but that would increase the size of every stateowner, when most lockowners are not that large. Instead, fix this by checking the encoded response length against NFSD4_REPLAY_ISIZE before copying into the replay buffer. If the response is too large, set rp_buflen to 0 to skip caching the replay payload. The status is still cached, and the client already received the correct response on the original request.

Severity ?

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/f9fcb4441f6c02bb2…
	https://git.kernel.org/stable/c/c9452c0797c95cf23…
	https://git.kernel.org/stable/c/8afb437ea1f70cacb…
	https://git.kernel.org/stable/c/dad0c3c0a8e5d1d6e…
	https://git.kernel.org/stable/c/0f0e2a54a31a7f9ad…
	https://git.kernel.org/stable/c/ae8498337dfdfda71…
	https://git.kernel.org/stable/c/5133b61aaf437e5f2…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f9fcb4441f6c02bb20c2eb340101e27dfe23607c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c9452c0797c95cf2378170df96cf4f4b3bca7eff (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8afb437ea1f70cacb4bbdf11771fb5c4d720b965 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < dad0c3c0a8e5d1d6eb0fc455694ce3e25e6c57d0 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0f0e2a54a31a7f9ad2915db99156114872317388 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ae8498337dfdfda71bdd0b807c9a23a126011d76 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5133b61aaf437e5f25b1b396b14242a6bb0508e2 (git)

Linux

Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
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CVE-2026-31431 (GCVE-0-2026-31431)

Vulnerability from cvelistv5 – Published: 2026-04-22 08:15 – Updated: 2026-05-07 06:58

Title

crypto: algif_aead - Revert to operating out-of-place

Summary

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.

Severity ?

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-669 - Incorrect Resource Transfer Between Spheres

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/893d22e0135fa394d…
	https://git.kernel.org/stable/c/19d43105a97be0810…
	https://git.kernel.org/stable/c/961cfa271a918ad4a…
	https://git.kernel.org/stable/c/3115af9644c342b35…
	https://git.kernel.org/stable/c/8b88d99341f139e23…
	https://git.kernel.org/stable/c/fafe0fa2995a0f707…
	https://git.kernel.org/stable/c/ce42ee423e58dffa5…
	https://git.kernel.org/stable/c/a664bf3d603dc3bdc…

Impacted products

Vendor

Product

Version

Linux

Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < 893d22e0135fa394db81df88697fba6032747667 (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < 19d43105a97be0810edbda875f2cd03f30dc130c (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < 961cfa271a918ad4ae452420e7c303149002875b (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < 3115af9644c342b356f3f07a4dd1c8905cd9a6fc (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < 8b88d99341f139e23bdeb1027a2a3ae10d341d82 (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8 (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < ce42ee423e58dffa5ec03524054c9d8bfd4f6237 (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5 (git)

Linux

Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 5.10.254 , ≤ 5.10.* (semver)
Unaffected: 5.15.204 , ≤ 5.15.* (semver)
Unaffected: 6.1.170 , ≤ 6.1.* (semver)
Unaffected: 6.6.137 , ≤ 6.6.* (semver)
Unaffected: 6.12.85 , ≤ 6.12.* (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Taxonomy of the tags.

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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.

Detection rules are retrieved from Rulezet.

Action not permitted

alsa-2026:13565

Vulnerability from osv_almalinux

CVE-2026-23270 (GCVE-0-2026-23270)

CVE-2026-23136 (GCVE-0-2026-23136)

CVE-2026-31402 (GCVE-0-2026-31402)

CVE-2026-31431 (GCVE-0-2026-31431)

Tags

Sightings

Nomenclature