blk-cgroup: Fix class @block_class's subsystem refcount leakage
In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix class @block_class's subsystem refcount leakage blkcg_fill_root_iostats() iterates over @block_class's devices by class_dev_iter_(init|next)(), but does not end iterating with class_dev_iter_exit(), so causes the class's subsystem refcount leakage. Fix by ending the iterating with class_dev_iter_exit().
CVE-2025-21745
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-2025-21745
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": "ef45fe470e1e5410db4af87abc5d5055427945ac",
"lessThan": "ffb494f1e7a047bd7a41b13796fcfb08fe5beafb",
"versionType": "git"
},
{
"status": "affected",
"version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
"lessThan": "38287f779b34dfe959b4b681e909f2d3d52b88be",
"versionType": "git"
},
{
"status": "affected",
"version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
"lessThan": "431b6ef2714be4d5babb802114987541a88b43b0",
"versionType": "git"
},
{
"status": "affected",
"version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
"lessThan": "993121481b5a87829f1e8163f47158b72679f309",
"versionType": "git"
},
{
"status": "affected",
"version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
"lessThan": "2ce09aabe009453d641a2ceb79e6461a2d4f3876",
"versionType": "git"
},
{
"status": "affected",
"version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
"lessThan": "67c7f213e052b1aa6caba4a7e25e303bc6997126",
"versionType": "git"
},
{
"status": "affected",
"version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
"lessThan": "d1248436cbef1f924c04255367ff4845ccd9025e",
"versionType": "git"
}
],
"programFiles": [
"block/blk-cgroup.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.235",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.179",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.129",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.78",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.14",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.3",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"block/blk-cgroup.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21745
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26930 · Revision 1
- Added to Heist Feed
- Publisher date