bpf: Zero queue and stack outputs on lock failure
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.
CVE-2026-92520
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-92520
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
"lessThan": "a6090eeb289c5fa45f7b629befac2bd3c19a6dae",
"versionType": "git"
},
{
"status": "affected",
"version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
"lessThan": "23b4bcc79bab5285275912b94e98c286f281de75",
"versionType": "git"
},
{
"status": "affected",
"version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
"lessThan": "1534c4bff3aaca19c4c9a82f93e9b81f7c983de3",
"versionType": "git"
},
{
"status": "affected",
"version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
"lessThan": "e2396b8a562073787e627a5f483f1bc5c452fa6a",
"versionType": "git"
},
{
"status": "affected",
"version": "a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8",
"lessThan": "7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232",
"versionType": "git"
},
{
"status": "affected",
"version": "40e34ea01748e5b8afdd40a172868be1e1ab0ede",
"versionType": "git"
},
{
"status": "affected",
"version": "388c9d3eefaea99828ee5000c693128a5b41ee7c",
"versionType": "git"
},
{
"status": "affected",
"version": "acabf5df49aa3a4f9c96200102d893351b511a88",
"versionType": "git"
},
{
"status": "affected",
"version": "e388671635acf470f0986d874389148fd234620b",
"versionType": "git"
},
{
"status": "affected",
"version": "232f0ba4d69263af5912e279fcc32fef2882b1dc",
"versionType": "git"
},
{
"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": "6.1.56",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.5.6",
"lessThan": "6.6",
"versionType": "semver"
}
],
"programFiles": [
"kernel/bpf/queue_stack_maps.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/queue_stack_maps.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-92520
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48703 · Revision 1
- Added to Heist Feed
- Publisher date