| Name | CVE-2025-39902 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4327-1, DLA-4328-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | bullseye | 5.10.223-1 | vulnerable |
| bullseye (security) | 5.10.244-1 | fixed | |
| bookworm | 6.1.148-1 | vulnerable | |
| bookworm (security) | 6.1.153-1 | fixed | |
| trixie | 6.12.43-1 | vulnerable | |
| trixie (security) | 6.12.48-1 | fixed | |
| forky, sid | 6.16.12-2 | fixed | |
| linux-6.1 (PTS) | bullseye (security) | 6.1.153-1~deb11u1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | bullseye | 5.10.244-1 | DLA-4327-1 | ||
| linux | source | bookworm | 6.1.153-1 | |||
| linux | source | trixie | 6.12.48-1 | |||
| linux | source | (unstable) | 6.16.6-1 | |||
| linux-6.1 | source | bullseye | 6.1.153-1~deb11u1 | DLA-4328-1 |
https://git.kernel.org/linus/b4efccec8d06ceb10a7d34d7b1c449c569d53770 (6.17-rc5)