CVE-2026-92520
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Zero queue and stack outputs on lock failure Queue and stack pop/peek helpers accept an uninitialized output buffer because the verifier expects the helper to initialize it. The empty-map error path clears the buffer, but a failed lock acquisition returns -EBUSY without writing it. Clear the output before returning -EBUSY so BPF programs cannot observe uninitialized stack contents after a failed helper call.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-17 17:17:54.900000
Last modified
2026-10-30 13:20:55.797000
View original CVE JSON
{
"id": "CVE-2026-92520",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-17T17:17:54.900",
"lastModified": "2026-10-30T13:20:55.797",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Zero queue and stack outputs on lock failure\n\nQueue and stack pop/peek helpers accept an uninitialized output buffer\nbecause the verifier expects the helper to initialize it. The empty-map\nerror path clears the buffer, but a failed lock acquisition returns\n-EBUSY without writing it.\n\nClear the output before returning -EBUSY so BPF programs cannot observe\nuninitialized stack contents after a failed helper call."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"kernel/bpf/queue_stack_maps.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "e388671635acf470f0986d874389148fd234620b",
"lessThan": "6468e8ac026b44ae2a78114b80f9d1b9164d0f6c",
"versionType": "git",
"status": "affected"
},
{
"version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
"lessThan": "a6090eeb289c5fa45f7b629befac2bd3c19a6dae",
"versionType": "git",
"status": "affected"
},
{
"version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
"lessThan": "23b4bcc79bab5285275912b94e98c286f281de75",
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"status": "affected"
},
{
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"versionType": "git",
"status": "affected"
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{
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{
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{
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"status": "affected"
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{
"version": "acabf5df49aa3a4f9c96200102d893351b511a88",
"versionType": "git",
"status": "affected"
},
{
"version": "232f0ba4d69263af5912e279fcc32fef2882b1dc",
"versionType": "git",
"status": "affected"
},
{
"version": "6.1.56",
"lessThan": "6.1.191",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.4.258",
"lessThan": "5.5",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.10.198",
"lessThan": "5.11",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.15.134",
"lessThan": "5.16",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.5.6",
"lessThan": "6.6",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"kernel/bpf/queue_stack_maps.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.6",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.160",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.114",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.52",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.6",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/1534c4bff3aaca19c4c9a82f93e9b81f7c983de3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/23b4bcc79bab5285275912b94e98c286f281de75",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6468e8ac026b44ae2a78114b80f9d1b9164d0f6c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a6090eeb289c5fa45f7b629befac2bd3c19a6dae",
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}