CVE-2022-0995
Published: 25 March 2022
Summary
CVE-2022-0995 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Linux Linux Kernel. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 3.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
The vulnerability is an out-of-bounds memory write (CWE-787) in the Linux kernel’s watch_queue event notification subsystem. The flaw, tracked as CVE-2022-0995 with a CVSS score of 7.8, allows an attacker to overwrite portions of kernel memory and is present in affected versions of the Linux kernel prior to the availability of patches.
A local attacker with low privileges can exploit the issue without user interaction to escalate privileges to root or trigger a denial of service. The attack requires only local access and leverages the watch_queue filtering code to corrupt kernel state.
Kernel developers addressed the flaw in commit 93ce93587d36493f2f86921fa79921b3cba63fbb. Red Hat, NetApp, and other vendors have published corresponding advisories urging users to apply the available kernel updates to mitigate the risk.
Public proof-of-concept exploits have been posted to Packet Storm, confirming that working code exists for the vulnerability. The EPSS score reached 0.2797 at disclosure and has shown no material subsequent increase.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-15988
Vulnerability details
An out-of-bounds (OOB) memory write flaw was found in the Linux kernel’s watch_queue event notification subsystem. This flaw can overwrite parts of the kernel state, potentially allowing a local user to gain privileged access or cause a denial of service…
more
on the system.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.