dm-pcache: clamp the tail kset read to the segment data region
In the Linux kernel, the following vulnerability has been resolved: dm-pcache: clamp the tail kset read to the segment data region The tail-kset read in cache_replay(), the writeback worker and the GC worker bounds its length by PCACHE_SEG_SIZE - seg_off, the raw segment size rather than the data region. A tail near the segment end reads past the segment data into the following control area. Clamp the read to cache_seg_remain(), the data region.
CVE-2026-80958
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-2026-80958
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": "1d57628ff95b32d5cfa8d8f50e07690c161e9cf0",
"lessThan": "2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c",
"versionType": "git"
},
{
"status": "affected",
"version": "1d57628ff95b32d5cfa8d8f50e07690c161e9cf0",
"lessThan": "1ab55354368d071ebaee4d8c82313955eab65a04",
"versionType": "git"
},
{
"status": "affected",
"version": "1d57628ff95b32d5cfa8d8f50e07690c161e9cf0",
"lessThan": "becf07e2b0053027495ecd671b1f82fb2e615f68",
"versionType": "git"
}
],
"programFiles": [
"drivers/md/dm-pcache/cache_gc.c",
"drivers/md/dm-pcache/cache_key.c",
"drivers/md/dm-pcache/cache_writeback.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/md/dm-pcache/cache_gc.c",
"drivers/md/dm-pcache/cache_key.c",
"drivers/md/dm-pcache/cache_writeback.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80958
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34916 · Revision 1
- Added to Heist Feed
- Publisher date