f2fs: fix valid block count leak on data block allocation failure
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix valid block count leak on data block allocation failure In __allocate_data_block(), when allocating a new data block (dn->data_blkaddr == NULL_ADDR), inc_valid_block_count() is called first to increment total_valid_block_count and i_blocks. If the subsequent f2fs_allocate_data_block() fails, the function returns the error directly without rolling back the already-incremented block counts, causing a permanent leak. Fix this by calling dec_valid_block_count() to undo the increment before returning the error. The condition old_blkaddr == NULL_ADDR precisely identifies the case where inc_valid_block_count() was called.
CVE-2026-89830
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-2026-89830
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": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47",
"lessThan": "2d50b6d47e5671ff6a25834c5906d443356191f0",
"versionType": "git"
},
{
"status": "affected",
"version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47",
"lessThan": "dde99df5a9d3b0ca6ac0a86f98799685f7399432",
"versionType": "git"
},
{
"status": "affected",
"version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47",
"lessThan": "931e1aa4d44c52ff8e0feb38420a8827c62e886b",
"versionType": "git"
},
{
"status": "affected",
"version": "7d009e048d7cfcc21d400f2aba4c8bacbdebbd47",
"lessThan": "0f9af07ecc1ab486038373db6ae0436c5d674b19",
"versionType": "git"
}
],
"programFiles": [
"fs/f2fs/data.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.9",
"versionType": "semver"
},
{
"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/data.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89830
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36288 · Revision 1
- Added to Heist Feed
- Publisher date