CVE-2022-0185
Linux Kernel Heap-Based Buffer Overflow Vulnerability
- High 8.4
- Exploited: added to CISA KEV 21 Aug 2024
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.
Key facts
- Published
- 11 Feb 2022
- Last changed
- 21 Oct 2025
- Assigned by
- redhat
- KEV added
- 21 Aug 2024
- KEV fix due
- 11 Sep 2024
- EPSS
- 25.151% likely to be exploited in the next 30 days, higher than 97.963% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 8.4CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | kernel |
|
Timeline
- 11 Feb 2022 Published
- 21 Aug 2024 CVE-2022-0185 added to CISA KEV
- 21 Aug 2024 Added to the CISA KEV catalogue