vulnerability

CVE-2022-0995

7.8

High

KEV · Exploited in wildEPSS 9%Patch available

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.

exploited

Yes, in CISA KEV since 26 Aug 2026fix by 29 Aug 2026 (CISA deadline for US federal agencies)public exploit code

fix

Patch available see the advisory in the references

likelihood

EPSS 8.9%

Published 25 Mar 2022Analysed here 2 Nov 2026CVSS scored by CISA

do firstApply 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.

triage

server-sideruntimeWAF can block: noAV · localCWE-787· Out-of-Bounds Write

Can a WAF block it? No. The attack needs local access to the machine, so a WAF is not on its path.

Also consider: patch

Based on the attack vector (local or physical access). We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.

cvss vector

attack vectorlocalattack complexitylowprivileges requiredlowuser interactionnonescopeunchangedconfidentialityhighintegrityhighavailabilityhigh

CVSS 3.1 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

common questions

Is CVE-2022-0995 being exploited?

Yes. CVE-2022-0995 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.

How severe is CVE-2022-0995?

CVE-2022-0995 is rated High with a CVSS score of 7.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2022-0995?

Yes. A fix has been recorded for CVE-2022-0995. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2022-0995 affect?

CVE-2022-0995 affects linux:linux_kernel, fedoraproject:fedora, netapp:h300e_firmware, netapp:h300s_firmware, and 9 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

linux:linux_kernelfedoraproject:fedoranetapp:h300e_firmwarenetapp:h300s_firmwarenetapp:h410c_firmwarenetapp:h410s_firmwarenetapp:h500e_firmwarenetapp:h500s_firmwarenetapp:h610c_firmwarenetapp:h610s_firmwarenetapp:h615c_firmwarenetapp:h700e_firmwarenetapp:h700s_firmware

affected versions

kernel

affectedkernel 5.17 rc8

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

public exploits

Public exploit code: 1 Metasploit module · 4 GitHub proofs of concept

Metasploit

exploit/linux/local/cve_2022_0995_watch_queue · exploit · great

GitHub proofs of concept

Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.

cisa ssvc

exploitation: active
automatable: no
technical impact: total

Assessed by CISA 26 Aug 2026 (SSVC 2.0.3).

timeline

25 Mar 2022Published
26 Mar 2022First public exploit or proof of concept · same day later
26 Aug 2026Added to CISA KEV (exploited in the wild) · 1,614 days (about 4 years) later
26 Aug 2026CISA SSVC assessment: exploitation active · same day later
27 Aug 2026CVE record last updated · 1 day later
29 Aug 2026CISA remediation due date (US federal agencies) · 2 days later
2 Nov 2026Analysed by vulneraibility.com · 66 days (about 2 months) later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

6 references in the CVE record: 6 links

Linkbugzilla.redhat.com /show_bug.cgi?id=2063786
Linkgit.kernel.org /pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93ce93587d36493f2f86921f
Linkpacketstormsecurity.com /files/166770/Linux-watch_queue-Filter-Out-Of-Bounds-Write.html
Linkpacketstormsecurity.com /files/166815/Watch-Queue-Out-Of-Bounds-Write.html
Linksecurity.netapp.com /advisory/ntap-20220429-0001/
Linkcisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-0995

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
CISA KEV catalog: exploitation, date added, due date
CISA Vulnrichment (ADP): SSVC decision points
FIRST EPSS: exploit probability and percentile
Metasploit Framework: exploit and scanner modules
PoC-in-GitHub: GitHub repositories that claim a proof of concept
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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