padata: Fix pd UAF once and for all
In the Linux kernel, the following vulnerability has been resolved: padata: Fix pd UAF once and for all There is a race condition/UAF in padata_reorder that goes back to the initial commit. A reference count is taken at the start of the process in padata_do_parallel, and released at the end in padata_serial_worker. This reference count is (and only is) required for padata_replace to function correctly. If padata_replace is never called then there is no issue. In the function padata_reorder which serves as the core of padata, as soon as padata is added to queue->serial.list, and the associated spin lock released, that padata may be processed and the reference count on pd would go away. Fix this by getting the next padata before the squeue->serial lock is released. In order to make this possible, simplify padata_reorder by only calling it once the next padata arrives.
CVE-2025-38584
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-2025-38584
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": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
"lessThan": "a2048e475e22b13dc3e53d485b7e6e11464ed9a6",
"versionType": "git"
},
{
"status": "affected",
"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
"lessThan": "73f132e60857038416540c3599b1de6033d7575a",
"versionType": "git"
},
{
"status": "affected",
"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
"lessThan": "609e59193fc6d9dd323f1c6ae1fdd721f1c79680",
"versionType": "git"
},
{
"status": "affected",
"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
"lessThan": "a11a12a9880ab37342b73c93cfe1a3ada02ff0db",
"versionType": "git"
},
{
"status": "affected",
"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
"lessThan": "f231d5d001ec75f5886c02d496a4c79edc383d45",
"versionType": "git"
},
{
"status": "affected",
"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
"lessThan": "dbe3e911a59bda6de96e7cae387ff882c2c177fa",
"versionType": "git"
},
{
"status": "affected",
"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
"lessThan": "cdf79bd2e1ecb3cc75631c73d8f4149be6019a52",
"versionType": "git"
},
{
"status": "affected",
"version": "16295bec6398a3eedc9377e1af6ff4c71b98c300",
"lessThan": "71203f68c7749609d7fc8ae6ad054bdedeb24f91",
"versionType": "git"
}
],
"programFiles": [
"include/linux/padata.h",
"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": "2.6.34"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.34",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.86",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.10",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16.1",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/linux/padata.h",
"kernel/padata.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38584
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30596 · Revision 1
- Added to Heist Feed
- Publisher date