| Name | CVE-2022-0185 |
| Description | A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux kernel verified the supplied parameters length. An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced CAP_SYS_ADMIN privilege) local user able to open a filesystem that does not support the Filesystem Context API (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
| References | DSA-5050-1 |
| NVD severity | high |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | stretch | 4.9.228-1 | fixed |
| stretch (security) | 4.9.303-1 | fixed | |
| buster | 4.19.235-1 | fixed | |
| buster (security) | 4.19.232-1 | fixed | |
| bullseye | 5.10.106-1 | fixed | |
| bullseye (security) | 5.10.113-1 | fixed | |
| bookworm | 5.17.3-1 | fixed | |
| sid | 5.17.6-1 | 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 | (not affected) | |||
| linux | source | buster | (not affected) | |||
| linux | source | bullseye | 5.10.92-1 | DSA-5050-1 | ||
| linux | source | (unstable) | 5.15.15-1 |
[buster] - linux <not-affected> (Vulnerable code introduced later)
[stretch] - linux <not-affected> (Vulnerable code introduced later)
Fixed by: https://git.kernel.org/linus/722d94847de29310e8aa03fcbdb41fc92c521756
https://www.openwall.com/lists/oss-security/2022/01/18/7
https://www.openwall.com/lists/oss-security/2022/01/25/14
https://www.willsroot.io/2022/01/cve-2022-0185.html