| Name | CVE-2021-22555 |
| Description | A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| linux (PTS) | buster | 4.19.249-2 | fixed |
| buster (security) | 4.19.289-2 | fixed |
| bullseye | 5.10.197-1 | fixed |
| bullseye (security) | 5.10.191-1 | fixed |
| bookworm | 6.1.66-1 | fixed |
| bookworm (security) | 6.1.52-1 | fixed |
| sid, trixie | 6.5.13-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| linux | source | stretch | 4.9.272-1 | | | |
| linux | source | buster | 4.19.194-1 | | | |
| linux | source | (unstable) | 5.10.38-1 | | | |
Notes
https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528
https://google.github.io/security-research/pocs/linux/cve-2021-22555/writeup.html