ext4: fix buffer_head leak in ext4_init_orphan_info
In the Linux kernel, the following vulnerability has been resolved: ext4: fix buffer_head leak in ext4_init_orphan_info ext4_init_orphan_info() reads orphan file blocks with ext4_bread() and stores the returned buffer_head in oi->of_binfo[i].ob_bh. If ext4_bread() succeeds but the orphan block magic or checksum validation fails, the function jumps to out_free. However, the old out_free loop starts releasing buffers from i - 1, so the current buffer_head at index i is skipped. This leaks the buffer_head reference obtained by ext4_bread() on the bad magic and bad checksum error paths. Fix this by tracking the number of successfully read buffer_heads and releasing exactly those buffer_heads on the error path.
CVE-2026-92494
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-2026-92494
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": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
"lessThan": "a9a6ec1298f9bc134b2c5db27d25bb10603b7113",
"versionType": "git"
},
{
"status": "affected",
"version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
"lessThan": "35fc83c65faf7949f5701bb34b20f822560a7718",
"versionType": "git"
},
{
"status": "affected",
"version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
"lessThan": "74637f7fef030e5fb2e835b7dfeb05efdc48e0fe",
"versionType": "git"
},
{
"status": "affected",
"version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
"lessThan": "6ec53ccab0d691b3c73e03d930343ca45987e88d",
"versionType": "git"
},
{
"status": "affected",
"version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
"lessThan": "1399f102d8a1855c1a38506057306ec79d0787d9",
"versionType": "git"
},
{
"status": "affected",
"version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
"lessThan": "e1e342d9a561c016b8531ec1f4dcefaad9d64954",
"versionType": "git"
},
{
"status": "affected",
"version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
"lessThan": "05704335803b69c1bfa8637b7ada942bf2ee8a41",
"versionType": "git"
}
],
"programFiles": [
"fs/ext4/orphan.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ext4/orphan.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-92494
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #37727 · Revision 1
- Added to Heist Feed
- Publisher date