ext4: fix circular lock dependency in ext4_ext_migrate
In the Linux kernel, the following vulnerability has been resolved: ext4: fix circular lock dependency in ext4_ext_migrate Move iput(tmp_inode) after ext4_writepages_up_write() to avoid a circular lock dependency between s_writepages_rwsem and sb_internal (freeze protection). The deadlock scenario: CPU0 (EXT4_IOC_MIGRATE) CPU1 (orphan cleanup during mount) ---- ---- ext4_ext_migrate() ext4_writepages_down_write() s_writepages_rwsem (write) ext4_evict_inode() sb_start_intwrite() [sb_internal] ... ext4_writepages() s_writepages_rwsem (read) [BLOCKED] iput(tmp_inode) ext4_evict_inode() sb_start_intwrite() [BLOCKED] The tmp_inode is a temporary inode with nlink=0 created solely for building the extent tree. Its eviction does not require s_writepages_rwsem protection, so deferring iput() until after releasing the rwsem is safe.
CVE-2026-93269
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-2026-93269
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": "cb85f4d23f794e24127f3e562cb3b54b0803f456",
"lessThan": "452950461241dfed8b1d32e94b227db38c99c5af",
"versionType": "git"
},
{
"status": "affected",
"version": "cb85f4d23f794e24127f3e562cb3b54b0803f456",
"lessThan": "ada23457d4748d6e9c36c6f871fc29a6f558c48c",
"versionType": "git"
},
{
"status": "affected",
"version": "cb85f4d23f794e24127f3e562cb3b54b0803f456",
"lessThan": "e4223231b6860141813637a6413c2371ae4d6fa8",
"versionType": "git"
},
{
"status": "affected",
"version": "cb85f4d23f794e24127f3e562cb3b54b0803f456",
"lessThan": "32f7ab52875ec7f800ca67e7176e5743a84baddf",
"versionType": "git"
},
{
"status": "affected",
"version": "cb85f4d23f794e24127f3e562cb3b54b0803f456",
"lessThan": "a897682793eba5de51ee6f3152760374afa629cf",
"versionType": "git"
},
{
"status": "affected",
"version": "eb799e163dc2bc1ea0a4820b66f79d32a5e907df",
"versionType": "git"
},
{
"status": "affected",
"version": "bcc1eab71a67c46b9e24544ac7923f44444174ce",
"versionType": "git"
},
{
"status": "affected",
"version": "8cf20fb73e73a4c4df0328b5297842c5ef34fdd9",
"versionType": "git"
},
{
"status": "affected",
"version": "e5d25003d059649e18a249635ed5ca7a7b1de5ad",
"versionType": "git"
},
{
"status": "affected",
"version": "69f8a7991fd93c49096ddd11574db3e7df238b7b",
"versionType": "git"
},
{
"status": "affected",
"version": "4.9.215",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.172",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.107",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.23",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.5.7",
"lessThan": "5.6",
"versionType": "semver"
}
],
"programFiles": [
"fs/ext4/migrate.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.6",
"versionType": "semver"
},
{
"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/migrate.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93269
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #37962 · Revision 1
- Added to Heist Feed
- Publisher date