Known exploited vulnerability · CISA KEV

CVE-2022-0995: Linux Kernel Out-of-Bounds Write Vulnerability

Linux Kernel contains an out-of-bounds memory write vulnerability which could allow a local user to gain privileged access or cause a denial of service on the system.

CVE-2022-0995

Exploited in the wild. Fix this first.

CISA added it to the Known Exploited Vulnerabilities catalog on 2026-08-26: attackers are using it right now.

CISA KEV: Listed; Added 2026-08-26 · federal fix-by 2026-08-29
EPSS (30 days): 8.9%; Higher than 95% of CVEs · 2026-11-01
CVSS v3.1: 7.8 High; CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What CISA says

Linux Kernel Out-of-Bounds Write Vulnerability

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

NVD description · published 2022-03-25

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 on the system.

Full record on NVD

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How to check if you are exposed to CVE-2022-0995

Find every Linux Kernel system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
Compare each version with the fixed versions in the vendor advisory below. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2022-0995.

US federal agencies had to fix this by 2026-08-29. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Affected versions

Versions the National Vulnerability Database lists as vulnerable to CVE-2022-0995. Check the vendor advisory for the exact fixed builds before you sign anything off.

Product	Vulnerable versions
Linux Kernel	from 5.8 before 5.10.106; from 5.11 before 5.15.29; from 5.16 before 5.16.5; 5.17-rc1; 5.17-rc2; 5.17-rc3 and 4 more
Fedoraproject Fedora	35
Netapp H300e Firmware	all versions
Netapp H300s Firmware	all versions
Netapp H410c Firmware	all versions
Netapp H410s Firmware	all versions

NVD lists 7 more affected products; see the full record on NVD.

Timeline

2022-03-25 · Published in the National Vulnerability Database
2026-08-26 · Added to CISA's Known Exploited Vulnerabilities catalog, 1,615 days after it was published
2026-08-29 · Fix-by date for US federal agencies, passed 64 days ago

Vendor advisories and fixes

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93ce93587d36493f2f86921fa79921b3cba63fbb

Weakness type

CWE-787

More exploited Linux vulnerabilities

CISA lists 32 exploited Linux vulnerabilities. The closest matches:

Keep going

Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.