HIGH 8.4 Microsoft PoC

CVE-2022-0185

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.

Microsoft Security Update 2022-Feb: 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.

Affected Products

References

Published: 2022-02-08 · Source: Microsoft · Feed updated: 2026-09-07
This high severity vulnerability with a CVSS score of 8.4 was published on 2022-02-08 via Microsoft. 🚨 A public proof-of-concept exploit is available on GitHub. EPSS score: 25.1% (top 2% of all CVEs by exploitation probability). Affected: cm1 kernel 5.10.93.1-4 on CBL Mariner 1.0, cbl2 kernel 5.15.26.1-1 on CBL Mariner 2.0.
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