| Name | CVE-2023-4128 |
| Description | A use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to incorrect handling of the existing filter, leading to a kernel information leak issue. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5480-1, DSA-5492-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | buster | 4.19.249-2 | vulnerable |
| buster (security) | 4.19.289-2 | vulnerable | |
| bullseye | 5.10.178-3 | vulnerable | |
| bullseye (security) | 5.10.191-1 | fixed | |
| bookworm | 6.1.38-1 | vulnerable | |
| bookworm (security) | 6.1.52-1 | fixed | |
| sid, trixie | 6.5.3-1 | 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 | 5.10.191-1 | DSA-5480-1 | ||
| linux | source | bookworm | 6.1.52-1 | DSA-5492-1 | ||
| linux | source | (unstable) | 6.4.11-1 |
https://git.kernel.org/linus/3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81 (6.5-rc5)
https://git.kernel.org/linus/76e42ae831991c828cffa8c37736ebfb831ad5ec (6.5-rc5)
https://git.kernel.org/linus/b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8 (6.5-rc5)