f2fs: accurately adjust free_sections during free_segment_range
In the Linux kernel, the following vulnerability has been resolved: f2fs: accurately adjust free_sections during free_segment_range In free_segment_range(), MAIN_SECS(sbi) is temporarily reduced by `secs` to restrict block allocation to the safe remaining main area while valid blocks in the truncated range are evacuated by GC. However, FREE_I(sbi)->free_sections tracks the total number of free sections across the whole filesystem. If any sections within the truncated range were already free upon entering free_segment_range(), failing to deduct them from free_sections causes the filesystem to overestimate available free sections in the active, reduced main area. This leads to inconsistent free section accounting during GC data migration and can trigger unexpected allocation failures or assertion errors when space is tight. Fix this by calculating the number of already-free sections in the truncated range, deducting them from free_sections upon entering free_segment_range(), and restoring them on exit.
CVE-2026-97534
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-2026-97534
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": "b4b10061ef98c583bcf82a4200703fbaa98c18dc",
"lessThan": "64a7ed42e9766886dd7300597d90366dfb7a1e53",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b10061ef98c583bcf82a4200703fbaa98c18dc",
"lessThan": "faeb0a20bdd113311519b598dcc075af3b6fb366",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b10061ef98c583bcf82a4200703fbaa98c18dc",
"lessThan": "ca31116fad0954c61a0d38163cc51c48e4981b75",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b10061ef98c583bcf82a4200703fbaa98c18dc",
"lessThan": "8a123a10770d2132d046748f20f02baa8d5539a1",
"versionType": "git"
},
{
"status": "affected",
"version": "b4b10061ef98c583bcf82a4200703fbaa98c18dc",
"lessThan": "8c963d1738fdca400082ff5f9d99e083de4f4e70",
"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": "5.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"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-2026-97534
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48778 · Revision 1
- Added to Heist Feed
- Publisher date