keys: fix out-of-bounds read in keyring_get_key_chunk()
In the Linux kernel, the following vulnerability has been resolved: keys: fix out-of-bounds read in keyring_get_key_chunk() For description-level chunks keyring_get_key_chunk() advances the read pointer by level * sizeof(long) past the inline prefix but only bounds-checks the prefix, so a long enough key description is read past its kmemdup(desc, desc_len + 1) allocation. Compute the full byte offset and bounds-check the description against it before reading. The walk only reaches a description-level chunk when two keys collide through the hash, x, type and domain_tag chunks, so this is reached from an unprivileged add_key(2) with a crafted pair of same-type keys whose index hashes collide; KASAN reports a slab-out-of-bounds read.
CVE-2026-74567
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-2026-74567
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": "f771fde82051976a6fc0fd570f8b86de4a92124b",
"lessThan": "4c0c26f751e50d3027eacc4d7d0fabc31f1d7e6b",
"versionType": "git"
},
{
"status": "affected",
"version": "f771fde82051976a6fc0fd570f8b86de4a92124b",
"lessThan": "79916f40d4ab1b4ae694d8c024fd179454bfe46e",
"versionType": "git"
},
{
"status": "affected",
"version": "f771fde82051976a6fc0fd570f8b86de4a92124b",
"lessThan": "e5b01998cef8d7f613200230ccaadebe5de9135c",
"versionType": "git"
},
{
"status": "affected",
"version": "f771fde82051976a6fc0fd570f8b86de4a92124b",
"lessThan": "d1933e03e8c74a018550c31a393b79c4d95bff40",
"versionType": "git"
},
{
"status": "affected",
"version": "f771fde82051976a6fc0fd570f8b86de4a92124b",
"lessThan": "3a744838453fb9309ce5a5526d3252e211d60152",
"versionType": "git"
},
{
"status": "affected",
"version": "f771fde82051976a6fc0fd570f8b86de4a92124b",
"lessThan": "e9417d21a22ad2ec398e78fcf084b717ce92cf2f",
"versionType": "git"
},
{
"status": "affected",
"version": "f771fde82051976a6fc0fd570f8b86de4a92124b",
"lessThan": "8dba33c1e779d0fb9a2acb31e354cf0fc0229111",
"versionType": "git"
},
{
"status": "affected",
"version": "f771fde82051976a6fc0fd570f8b86de4a92124b",
"lessThan": "63918731f9ae25b5deb022f118e941e6dddfcef4",
"versionType": "git"
}
],
"programFiles": [
"security/keys/keyring.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"security/keys/keyring.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74567
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33208 · Revision 1
- Added to Heist Feed
- Publisher date