CVE-2022-50356 (GCVE-0-2022-50356)
Vulnerability from cvelistv5 – Published: 2025-09-17 14:56 – Updated: 2026-05-11 19:17
VLAI
EPSS
VEX
Title
net: sched: sfb: fix null pointer access issue when sfb_init() fails
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: sched: sfb: fix null pointer access issue when sfb_init() fails
When the default qdisc is sfb, if the qdisc of dev_queue fails to be
inited during mqprio_init(), sfb_reset() is invoked to clear resources.
In this case, the q->qdisc is NULL, and it will cause gpf issue.
The process is as follows:
qdisc_create_dflt()
sfb_init()
tcf_block_get() --->failed, q->qdisc is NULL
...
qdisc_put()
...
sfb_reset()
qdisc_reset(q->qdisc) --->q->qdisc is NULL
ops = qdisc->ops
The following is the Call Trace information:
general protection fault, probably for non-canonical address
0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
RIP: 0010:qdisc_reset+0x2b/0x6f0
Call Trace:
<TASK>
sfb_reset+0x37/0xd0
qdisc_reset+0xed/0x6f0
qdisc_destroy+0x82/0x4c0
qdisc_put+0x9e/0xb0
qdisc_create_dflt+0x2c3/0x4a0
mqprio_init+0xa71/0x1760
qdisc_create+0x3eb/0x1000
tc_modify_qdisc+0x408/0x1720
rtnetlink_rcv_msg+0x38e/0xac0
netlink_rcv_skb+0x12d/0x3a0
netlink_unicast+0x4a2/0x740
netlink_sendmsg+0x826/0xcc0
sock_sendmsg+0xc5/0x100
____sys_sendmsg+0x583/0x690
___sys_sendmsg+0xe8/0x160
__sys_sendmsg+0xbf/0x160
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f2164122d04
</TASK>
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:32 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
e13e02a3c68d899169c78d9a18689bd73491d59a , < ded86c4191a3c17f8200d17a7d8a6f63b74554ae
(git)
Affected: e13e02a3c68d899169c78d9a18689bd73491d59a , < c2e1e59d59fafe297779ceae1fe0e6fbebc3e745 (git) Affected: e13e02a3c68d899169c78d9a18689bd73491d59a , < 723399af2795fb95687a531c9480464b5f489333 (git) Affected: e13e02a3c68d899169c78d9a18689bd73491d59a , < 2a3fc78210b9f0e85372a2435368962009f480fc (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.39
Unaffected: 0 , < 2.6.39 (semver) Unaffected: 5.10.152 , ≤ 5.10.* (semver) Unaffected: 5.15.76 , ≤ 5.15.* (semver) Unaffected: 6.0.6 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2022-50356",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-14T18:32:08.065447Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-476",
"description": "CWE-476 NULL Pointer Dereference",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-14T18:33:01.117Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/sched/sch_sfb.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "ded86c4191a3c17f8200d17a7d8a6f63b74554ae",
"status": "affected",
"version": "e13e02a3c68d899169c78d9a18689bd73491d59a",
"versionType": "git"
},
{
"lessThan": "c2e1e59d59fafe297779ceae1fe0e6fbebc3e745",
"status": "affected",
"version": "e13e02a3c68d899169c78d9a18689bd73491d59a",
"versionType": "git"
},
{
"lessThan": "723399af2795fb95687a531c9480464b5f489333",
"status": "affected",
"version": "e13e02a3c68d899169c78d9a18689bd73491d59a",
"versionType": "git"
},
{
"lessThan": "2a3fc78210b9f0e85372a2435368962009f480fc",
"status": "affected",
"version": "e13e02a3c68d899169c78d9a18689bd73491d59a",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/sched/sch_sfb.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.39"
},
{
"lessThan": "2.6.39",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.152",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.76",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.152",
"versionStartIncluding": "2.6.39",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.76",
"versionStartIncluding": "2.6.39",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0.6",
"versionStartIncluding": "2.6.39",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1",
"versionStartIncluding": "2.6.39",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: sfb: fix null pointer access issue when sfb_init() fails\n\nWhen the default qdisc is sfb, if the qdisc of dev_queue fails to be\ninited during mqprio_init(), sfb_reset() is invoked to clear resources.\nIn this case, the q-\u003eqdisc is NULL, and it will cause gpf issue.\n\nThe process is as follows:\nqdisc_create_dflt()\n\tsfb_init()\n\t\ttcf_block_get() ---\u003efailed, q-\u003eqdisc is NULL\n\t...\n\tqdisc_put()\n\t\t...\n\t\tsfb_reset()\n\t\t\tqdisc_reset(q-\u003eqdisc) ---\u003eq-\u003eqdisc is NULL\n\t\t\t\tops = qdisc-\u003eops\n\nThe following is the Call Trace information:\ngeneral protection fault, probably for non-canonical address\n0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]\nRIP: 0010:qdisc_reset+0x2b/0x6f0\nCall Trace:\n\u003cTASK\u003e\nsfb_reset+0x37/0xd0\nqdisc_reset+0xed/0x6f0\nqdisc_destroy+0x82/0x4c0\nqdisc_put+0x9e/0xb0\nqdisc_create_dflt+0x2c3/0x4a0\nmqprio_init+0xa71/0x1760\nqdisc_create+0x3eb/0x1000\ntc_modify_qdisc+0x408/0x1720\nrtnetlink_rcv_msg+0x38e/0xac0\nnetlink_rcv_skb+0x12d/0x3a0\nnetlink_unicast+0x4a2/0x740\nnetlink_sendmsg+0x826/0xcc0\nsock_sendmsg+0xc5/0x100\n____sys_sendmsg+0x583/0x690\n___sys_sendmsg+0xe8/0x160\n__sys_sendmsg+0xbf/0x160\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f2164122d04\n\u003c/TASK\u003e"
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T19:17:57.127Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ded86c4191a3c17f8200d17a7d8a6f63b74554ae"
},
{
"url": "https://git.kernel.org/stable/c/c2e1e59d59fafe297779ceae1fe0e6fbebc3e745"
},
{
"url": "https://git.kernel.org/stable/c/723399af2795fb95687a531c9480464b5f489333"
},
{
"url": "https://git.kernel.org/stable/c/2a3fc78210b9f0e85372a2435368962009f480fc"
}
],
"title": "net: sched: sfb: fix null pointer access issue when sfb_init() fails",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50356",
"datePublished": "2025-09-17T14:56:09.165Z",
"dateReserved": "2025-09-17T14:53:06.994Z",
"dateUpdated": "2026-05-11T19:17:57.127Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2022-50356",
"date": "2026-09-16",
"epss": "0.00203",
"percentile": "0.10445"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2022-50356\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-17T15:15:34.277\",\"lastModified\":\"2026-06-17T05:23:18.910\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: sched: sfb: fix null pointer access issue when sfb_init() fails\\n\\nWhen the default qdisc is sfb, if the qdisc of dev_queue fails to be\\ninited during mqprio_init(), sfb_reset() is invoked to clear resources.\\nIn this case, the q-\u003eqdisc is NULL, and it will cause gpf issue.\\n\\nThe process is as follows:\\nqdisc_create_dflt()\\n\\tsfb_init()\\n\\t\\ttcf_block_get() ---\u003efailed, q-\u003eqdisc is NULL\\n\\t...\\n\\tqdisc_put()\\n\\t\\t...\\n\\t\\tsfb_reset()\\n\\t\\t\\tqdisc_reset(q-\u003eqdisc) ---\u003eq-\u003eqdisc is NULL\\n\\t\\t\\t\\tops = qdisc-\u003eops\\n\\nThe following is the Call Trace information:\\ngeneral protection fault, probably for non-canonical address\\n0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN\\nKASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]\\nRIP: 0010:qdisc_reset+0x2b/0x6f0\\nCall Trace:\\n\u003cTASK\u003e\\nsfb_reset+0x37/0xd0\\nqdisc_reset+0xed/0x6f0\\nqdisc_destroy+0x82/0x4c0\\nqdisc_put+0x9e/0xb0\\nqdisc_create_dflt+0x2c3/0x4a0\\nmqprio_init+0xa71/0x1760\\nqdisc_create+0x3eb/0x1000\\ntc_modify_qdisc+0x408/0x1720\\nrtnetlink_rcv_msg+0x38e/0xac0\\nnetlink_rcv_skb+0x12d/0x3a0\\nnetlink_unicast+0x4a2/0x740\\nnetlink_sendmsg+0x826/0xcc0\\nsock_sendmsg+0xc5/0x100\\n____sys_sendmsg+0x583/0x690\\n___sys_sendmsg+0xe8/0x160\\n__sys_sendmsg+0xbf/0x160\\ndo_syscall_64+0x35/0x80\\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\\nRIP: 0033:0x7f2164122d04\\n\u003c/TASK\u003e\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/sched/sch_sfb.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e13e02a3c68d899169c78d9a18689bd73491d59a\",\"lessThan\":\"ded86c4191a3c17f8200d17a7d8a6f63b74554ae\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e13e02a3c68d899169c78d9a18689bd73491d59a\",\"lessThan\":\"c2e1e59d59fafe297779ceae1fe0e6fbebc3e745\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e13e02a3c68d899169c78d9a18689bd73491d59a\",\"lessThan\":\"723399af2795fb95687a531c9480464b5f489333\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e13e02a3c68d899169c78d9a18689bd73491d59a\",\"lessThan\":\"2a3fc78210b9f0e85372a2435368962009f480fc\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/sched/sch_sfb.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.39\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.39\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.152\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.76\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.6\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-01-14T18:32:08.065447Z\",\"id\":\"CVE-2022-50356\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.39\",\"versionEndExcluding\":\"5.10.152\",\"matchCriteriaId\":\"6607246F-64B2-4816-A08F-B12D321DF4A8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.76\",\"matchCriteriaId\":\"918A4953-6F82-40F5-B7A9-9836905139C1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.0.6\",\"matchCriteriaId\":\"98F5FA4A-A33F-4FAD-894E-FDC9D295742A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E7E331DA-1FB0-4DEC-91AC-7DA69D461C11\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2a3fc78210b9f0e85372a2435368962009f480fc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/723399af2795fb95687a531c9480464b5f489333\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c2e1e59d59fafe297779ceae1fe0e6fbebc3e745\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ded86c4191a3c17f8200d17a7d8a6f63b74554ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-19T21:04:52+00:00",
"cve": "CVE-2022-50356",
"id": "CVE-2022-50356",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:fixed": "883",
"product_status:known_affected": "122",
"product_status:known_not_affected": "92",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net: sched: sfb: fix null pointer access issue when sfb_init() fails",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50356.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-29T02:21:39Z",
"cve": "CVE-2022-50356",
"id": "CVE-2022-50356",
"initial_release_date": "2025-09-17T23:31:02Z",
"product_status:known_affected": "632",
"product_status:known_not_affected": "170",
"product_status:recommended": "191",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2022-50356",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50356.json",
"version": "49"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-50356\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T18:32:08.065447Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T18:32:03.827Z\"}}], \"cna\": {\"title\": \"net: sched: sfb: fix null pointer access issue when sfb_init() fails\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"e13e02a3c68d899169c78d9a18689bd73491d59a\", \"lessThan\": \"ded86c4191a3c17f8200d17a7d8a6f63b74554ae\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e13e02a3c68d899169c78d9a18689bd73491d59a\", \"lessThan\": \"c2e1e59d59fafe297779ceae1fe0e6fbebc3e745\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e13e02a3c68d899169c78d9a18689bd73491d59a\", \"lessThan\": \"723399af2795fb95687a531c9480464b5f489333\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e13e02a3c68d899169c78d9a18689bd73491d59a\", \"lessThan\": \"2a3fc78210b9f0e85372a2435368962009f480fc\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sched/sch_sfb.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.39\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.39\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.152\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.76\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sched/sch_sfb.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/ded86c4191a3c17f8200d17a7d8a6f63b74554ae\"}, {\"url\": \"https://git.kernel.org/stable/c/c2e1e59d59fafe297779ceae1fe0e6fbebc3e745\"}, {\"url\": \"https://git.kernel.org/stable/c/723399af2795fb95687a531c9480464b5f489333\"}, {\"url\": \"https://git.kernel.org/stable/c/2a3fc78210b9f0e85372a2435368962009f480fc\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: sched: sfb: fix null pointer access issue when sfb_init() fails\\n\\nWhen the default qdisc is sfb, if the qdisc of dev_queue fails to be\\ninited during mqprio_init(), sfb_reset() is invoked to clear resources.\\nIn this case, the q-\u003eqdisc is NULL, and it will cause gpf issue.\\n\\nThe process is as follows:\\nqdisc_create_dflt()\\n\\tsfb_init()\\n\\t\\ttcf_block_get() ---\u003efailed, q-\u003eqdisc is NULL\\n\\t...\\n\\tqdisc_put()\\n\\t\\t...\\n\\t\\tsfb_reset()\\n\\t\\t\\tqdisc_reset(q-\u003eqdisc) ---\u003eq-\u003eqdisc is NULL\\n\\t\\t\\t\\tops = qdisc-\u003eops\\n\\nThe following is the Call Trace information:\\ngeneral protection fault, probably for non-canonical address\\n0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN\\nKASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]\\nRIP: 0010:qdisc_reset+0x2b/0x6f0\\nCall Trace:\\n\u003cTASK\u003e\\nsfb_reset+0x37/0xd0\\nqdisc_reset+0xed/0x6f0\\nqdisc_destroy+0x82/0x4c0\\nqdisc_put+0x9e/0xb0\\nqdisc_create_dflt+0x2c3/0x4a0\\nmqprio_init+0xa71/0x1760\\nqdisc_create+0x3eb/0x1000\\ntc_modify_qdisc+0x408/0x1720\\nrtnetlink_rcv_msg+0x38e/0xac0\\nnetlink_rcv_skb+0x12d/0x3a0\\nnetlink_unicast+0x4a2/0x740\\nnetlink_sendmsg+0x826/0xcc0\\nsock_sendmsg+0xc5/0x100\\n____sys_sendmsg+0x583/0x690\\n___sys_sendmsg+0xe8/0x160\\n__sys_sendmsg+0xbf/0x160\\ndo_syscall_64+0x35/0x80\\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\\nRIP: 0033:0x7f2164122d04\\n\u003c/TASK\u003e\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.152\", \"versionStartIncluding\": \"2.6.39\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.76\", \"versionStartIncluding\": \"2.6.39\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.6\", \"versionStartIncluding\": \"2.6.39\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"2.6.39\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-09-17T14:56:09.165Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2022-50356\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-14T18:33:01.117Z\", \"dateReserved\": \"2025-09-17T14:53:06.994Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-17T14:56:09.165Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…