ocfs2: fix UBSAN array-index-out-of-bounds in ocfs2_sum_rightmost_rec
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix UBSAN array-index-out-of-bounds in ocfs2_sum_rightmost_rec [BUG] On-disk corruption setting l_next_free_rec to 0 in an inode's embedded extent list triggers a UBSAN panic on the next write to that file. [CAUSE] ocfs2_sum_rightmost_rec() computes i = le16_to_cpu(el->l_next_free_rec) - 1 and accesses el->l_recs[i] without validating i. When l_next_free_rec is 0, i becomes -1; when l_next_free_rec exceeds l_count, i falls past the end of the array. Either case violates the __counted_by_le(l_count) annotation on l_recs[] and triggers UBSAN. [FIX] Validate the inode's embedded extent list when the inode is read, in ocfs2_validate_inode_block(): l_count must be non-zero and no larger than the inode block can hold, and l_next_free_rec must not exceed l_count. A corrupt list is rejected at read time, before the b-tree code can index l_recs[] out of bounds.
CVE-2026-72162
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-2026-72162
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": "dcd0538ff4e854fa9d7f4630b359ca8fdb5cb5a8",
"lessThan": "c286319746cef02bcce7384fda3a3f08989070d2",
"versionType": "git"
},
{
"status": "affected",
"version": "dcd0538ff4e854fa9d7f4630b359ca8fdb5cb5a8",
"lessThan": "720fb324cf0f5116318cae7f75cb393d118ffb67",
"versionType": "git"
},
{
"status": "affected",
"version": "dcd0538ff4e854fa9d7f4630b359ca8fdb5cb5a8",
"lessThan": "671889c553ea55e2da6a4f3b15f4c0fa40f2f0d1",
"versionType": "git"
},
{
"status": "affected",
"version": "dcd0538ff4e854fa9d7f4630b359ca8fdb5cb5a8",
"lessThan": "858aa4965ffa8c0d4bb5dd835ac4f1c9a1dcab85",
"versionType": "git"
},
{
"status": "affected",
"version": "dcd0538ff4e854fa9d7f4630b359ca8fdb5cb5a8",
"lessThan": "452a8467be8143747292218212671deeb186d2ae",
"versionType": "git"
}
],
"programFiles": [
"fs/ocfs2/inode.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.22"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.22",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ocfs2/inode.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72162
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46492 · Revision 1
- Added to Heist Feed
- Publisher date