padata: avoid UAF for reorder_work
In the Linux kernel, the following vulnerability has been resolved: padata: avoid UAF for reorder_work Although the previous patch can avoid ps and ps UAF for _do_serial, it can not avoid potential UAF issue for reorder_work. This issue can happen just as below: crypto_request crypto_request crypto_del_alg padata_do_serial ... padata_reorder // processes all remaining // requests then breaks while (1) { if (!padata) break; ... } padata_do_serial // new request added list_add // sees the new request queue_work(reorder_work) padata_reorder queue_work_on(squeue->work) ... padata_serial_worker // completes new request, // no more outstanding // requests crypto_del_alg // free pd invoke_padata_reorder // UAF of pd To avoid UAF for 'reorder_work', get 'pd' ref before put 'reorder_work' into the 'serial_wq' and put 'pd' ref until the 'serial_wq' finish.
CVE-2025-21726
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-2025-21726
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": "bbefa1dd6a6d53537c11624752219e39959d04fb",
"lessThan": "f4f1b1169fc3694f9bc3e28c6c68dbbf4cc744c0",
"versionType": "git"
},
{
"status": "affected",
"version": "bbefa1dd6a6d53537c11624752219e39959d04fb",
"lessThan": "4c6209efea2208597dbd3e52dc87a0d1a8f2dbe1",
"versionType": "git"
},
{
"status": "affected",
"version": "bbefa1dd6a6d53537c11624752219e39959d04fb",
"lessThan": "7000507bb0d2ceb545c0a690e0c707c897d102c2",
"versionType": "git"
},
{
"status": "affected",
"version": "bbefa1dd6a6d53537c11624752219e39959d04fb",
"lessThan": "6f45ef616775b0ce7889b0f6077fc8d681ab30bc",
"versionType": "git"
},
{
"status": "affected",
"version": "bbefa1dd6a6d53537c11624752219e39959d04fb",
"lessThan": "8ca38d0ca8c3d30dd18d311f1a7ec5cb56972cac",
"versionType": "git"
},
{
"status": "affected",
"version": "bbefa1dd6a6d53537c11624752219e39959d04fb",
"lessThan": "a54091c24220a4cd847d5b4f36d678edacddbaf0",
"versionType": "git"
},
{
"status": "affected",
"version": "bbefa1dd6a6d53537c11624752219e39959d04fb",
"lessThan": "dd7d37ccf6b11f3d95e797ebe4e9e886d0332600",
"versionType": "git"
},
{
"status": "affected",
"version": "b4c8ed0bf977760a206997b6429a7ac91978f440",
"versionType": "git"
},
{
"status": "affected",
"version": "e43d65719527043f1ef79ecba9d4ede58cbc7ffe",
"versionType": "git"
},
{
"status": "affected",
"version": "5.4.19",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.5.3",
"lessThan": "5.6",
"versionType": "semver"
}
],
"programFiles": [
"kernel/padata.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": "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": "6.6.76",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.13",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.2",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/padata.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21726
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #26923 · Revision 1
- Added to Heist Feed
- Publisher date