f2fs: fix to migrate all curseg types during free_segment_range
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to migrate all curseg types during free_segment_range In free_segment_range(), the curseg evacuation loop only iterates up to NR_CURSEG_PERSIST_TYPE (0..5), missing non-persistent in-memory curseg types such as CURSEG_COLD_DATA_PINNED and CURSEG_ALL_DATA_ATGC. Even though these in-memory curseg types are not saved in the on-disk checkpoint header, they still occupy active physical segments at runtime. If an active in-memory curseg happens to be allocated within the segment range being truncated during filesystem shrink, failing to evacuate it will cause subsequent writes to the curseg attempting out-of-bounds I/O on the truncated storage range. Fix this by expanding the curseg evacuation loop upper bound to NR_CURSEG_TYPE to ensure all active curseg types are safely migrated out of the target range.
CVE-2026-89834
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-2026-89834
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": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d",
"lessThan": "d358d2fc6be11eefde5eb1286f1c43a6d0330db6",
"versionType": "git"
},
{
"status": "affected",
"version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d",
"lessThan": "3b85edf3391f3e1f624f409a7d2d239885f567b7",
"versionType": "git"
},
{
"status": "affected",
"version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d",
"lessThan": "b8ae1228c153622afa71a179c9d4dc268117e0f0",
"versionType": "git"
},
{
"status": "affected",
"version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d",
"lessThan": "b9776094aa7118e8e5dfdcd791ffc8330c5ca408",
"versionType": "git"
},
{
"status": "affected",
"version": "d0b9e42ab6155dc05fc83f00af9f45d4dd02264d",
"lessThan": "8ec06f50ddd8d201bd7e55b896ae28ed9d4cb7d1",
"versionType": "git"
}
],
"programFiles": [
"fs/f2fs/gc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/f2fs/gc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89834
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48556 · Revision 1
- Added to Heist Feed
- Publisher date