mm/slub: avoid accessing metadata when pointer is invalid in object_err()
In the Linux kernel, the following vulnerability has been resolved: mm/slub: avoid accessing metadata when pointer is invalid in object_err() object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However, if the pointer is invalid, attempting to access object metadata can lead to a crash since it does not point to a valid object. One known path to the crash is when alloc_consistency_checks() determines the pointer to the allocated object is invalid because of a freelist corruption, and calls object_err() to report it. The debug code should report and handle the corruption gracefully and not crash in the process. In case the pointer is NULL or check_valid_pointer() returns false for the pointer, only print the pointer value and skip accessing metadata.
CVE-2025-39902
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-2025-39902
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": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"lessThan": "872f2c34ff232af1e65ad2df86d61163c8ffad42",
"versionType": "git"
},
{
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"lessThan": "f66012909e7bf383fcdc5850709ed5716073fdc4",
"versionType": "git"
},
{
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"lessThan": "7e287256904ee796c9477e3ec92b07f236481ef3",
"versionType": "git"
},
{
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"lessThan": "1f0797f17927b5cad0fb7eced422f9a7c30a3191",
"versionType": "git"
},
{
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"lessThan": "0ef7058b4dc6fcef622ac23b45225db57f17b83f",
"versionType": "git"
},
{
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"lessThan": "dda6ec365ab04067adae40ef17015db447e90736",
"versionType": "git"
},
{
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"lessThan": "3baa1da473e6e50281324ff1d332d1a07a3bb02e",
"versionType": "git"
},
{
"status": "affected",
"version": "81819f0fc8285a2a5a921c019e3e3d7b6169d225",
"lessThan": "b4efccec8d06ceb10a7d34d7b1c449c569d53770",
"versionType": "git"
}
],
"programFiles": [
"mm/slub.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.22"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.22",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.299",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.243",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.192",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.151",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.105",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.46",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.16.6",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"mm/slub.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-39902
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30638 · Revision 1
- Added to Heist Feed
- Publisher date