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.
Metrics
CVSS 3.1 8.4/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | kernel | 8.4 |
| linux | linux_kernel | 8.4 |
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de2Mailing List, Patch
- https://github.com/Crusaders-of-Rust/CVE-2022-0185Exploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220225-0003/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/01/18/7Mailing List, Patch, Third Party Advisory
- https://www.willsroot.io/2022/01/cve-2022-0185.htmlExploit, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=722d94847de2Mailing List, Patch
- https://github.com/Crusaders-of-Rust/CVE-2022-0185Exploit, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220225-0003/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/01/18/7Mailing List, Patch, Third Party Advisory
- https://www.willsroot.io/2022/01/cve-2022-0185.htmlExploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-0185US Government Resource
Timeline
- Published
- Feb 11, 2022
- Last modified
- Jun 17, 2026
- Added to CISA KEV
- Aug 21, 2024
- NVD status
- Analyzed