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.
CVE-2022-0995
“▲” beside the score: it is higher than NVD's CVSS score.
Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-08-26), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 retained for reference. The 9.0 is the floor for confirmed exploitation, not an impact rating: this CVE's impact severity (EG Severity) is CVSS 7.8 HIGH under NVD CVSS v3. Confidence: HIGH.
Also known asEUVD-2022-15988 (ENISA EUVD) · GHSA-q5p3-3mpm-hppr (GitHub Security Advisories)Source: ENISA EUVD
- Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at low or medium mission impact
A fix is available — apply it.
- CVSS v3
- 7.8
- EG Score
- 9.0CRITICALhigh confidence
- EG Risk
- 75EG Risk 75/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity78% × 45%Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation100% × 40%Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Attend at medium and Act at high mission impact.Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact. - EPSS PROB
- 8.9%
- EPSS %ILE
- 95th
- KEV
- ⚠ Exploited
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is the CISA KEV floor for confirmed exploitation, not an impact rating: its impact severity (EG Severity) is CVSS 7.8 HIGH.
- EG Severity
- 7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 8.9% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- CISA KEV and EG-KEV Tier 1 (exploited in the wild)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Attend at medium mission impactTrack at low, Attend at medium and Act at high mission impact.CISA BOD 26-04: 3 days & forensic triage if the affected system is publicly exposed; 14 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Attend at medium and Act at high mission impact.
A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.
Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days & forensic triage if the affected system is publicly exposed; 14 days if it is not.
The score's inputs: In CISA KEV yes (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
CISA required action“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.”
Quoted verbatim from CISA's Known Exploited Vulnerabilities catalog. CISA directs it at US federal civilian executive branch agencies under Binding Operational Directive (BOD) 26-04, which replaced BOD 22-01 on 10 June 2026; it is not EchelonGraph's advice. CISA's notes: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93ce93587d36493f2f86921fa79921b3cba63fbb · https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk · https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk · https://nvd.nist.gov/vuln/detail/CVE-2022-0995
Published
March 25, 2022
Last Modified
August 27, 2026
Advisory Details (5)
Auto-updated Oct 26, 2026Merge branch 'davidh' (fixes from David Howells) - kernel/git/torvalds/linux.git - Linux kernel source tree
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=93ce93587d36493f2f86921fa79921b3cba63fbb2063786 – (CVE-2022-0995) CVE-2022-0995 kernel: kernel bug in the watch_queue subsystem
https://bugzilla.redhat.com/show_bug.cgi?id=2063786Packet Storm
http://packetstormsecurity.com/files/166815/Watch-Queue-Out-Of-Bounds-Write.htmlVendor Advisories for CVE-2022-0995(2)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- CVE-2022-0995Microsoft Security Response Center (MSRC)High
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.
- GHSA-q5p3-3mpm-hpprGitHub Security AdvisoriesHigh
An out-of-bounds (OOB) memory write flaw was found in the Linux kernel’s watch_queue event...
Patch Availability(11)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | oracle (4.15.0-1129) @ bionic | 2026-11-01 | ubuntu |
| ubuntu | linux-virtual-hwe-20.04-edge (5.15.0.138.134) @ jammy | 2026-11-01 | ubuntu |
| ubuntu | linux-tools-gcp-fips (5.15.0.1081.71) @ jammy | 2026-11-01 | ubuntu |
| ubuntu | linux-tools-realtime (5.15.0.1082.86) @ jammy | 2026-11-01 | ubuntu |
| ubuntu | linux-tools-intel-iotg-edge (5.15.0.1077.83~20.04.1) @ focal | 2026-11-01 | ubuntu |
| ubuntu | linux-tools-gcp-edge (5.15.0.1081.90~20.04.1) @ focal | 2026-11-01 | ubuntu |
| ubuntu | linux-tools-aws-edge (5.15.0.1082.89~20.04.1) @ focal | 2026-11-01 | ubuntu |
| ubuntu | oracle (5.15.0-1055) @ jammy | 2026-11-01 | ubuntu |
| ubuntu | linux-tools-oracle-edge (5.15.0.1079.85~20.04.1) @ focal | 2026-11-01 | ubuntu |
| ubuntu | linux-xilinx-zynqmp-tools-host (5.15.0-1046.50) @ jammy | 2026-11-01 | ubuntu |
| ubuntu | linux-tools-azure-fips (5.15.0.1087.72) @ jammy | 2026-11-01 | ubuntu |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(4 across 4 ecosystems)
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 5.10.103-1 ... 5.10.92-2 (10 versions) |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(11)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
- UbuntuLSN-0111-1HIGH
Kernel Live Patch Security Notice
- UbuntuLSN-0112-1HIGH
Kernel Live Patch Security Notice
- UbuntuUSN-7455-1HIGH
Linux kernel vulnerabilities
- UbuntuUSN-7455-2HIGH
Linux kernel (FIPS) vulnerabilities
- UbuntuUSN-7455-3HIGH
Linux kernel (Real-time) vulnerabilities
- UbuntuUSN-7455-4HIGH
Linux kernel (Oracle) vulnerabilities
- UbuntuUSN-7455-5HIGH
Linux kernel (AWS) vulnerabilities
- UbuntuUSN-7459-1HIGH
Linux kernel (Intel IoTG) vulnerabilities
- UbuntuUSN-7459-2HIGH
Linux kernel (GCP) vulnerabilities
- UbuntuUSN-7460-1HIGH
Linux kernel (Azure FIPS) vulnerabilities
- UbuntuUSN-7475-1HIGH
Linux kernel (Xilinx ZynqMP) vulnerabilities
Data Freshness Timeline
(refreshed 26× in last 7d / 211× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 906 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 806 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 12:08 UTCEG score recompute
- 2026-11-01 12:08 UTCVendor advisory
- 2026-11-01 12:08 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-31 16:29 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-31 11:52 UTCEG score recompute
- 2026-10-31 11:52 UTCVendor advisory
- 2026-10-31 11:51 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-30 16:30 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-30 11:36 UTCEG score recompute
- 2026-10-30 11:36 UTCVendor advisory
- 2026-10-30 11:35 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-29 16:29 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-29 11:20 UTCEG score recompute
- 2026-10-29 11:20 UTCVendor advisory
- 2026-10-29 11:20 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-28 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-28 11:05 UTCEG score recompute
- 2026-10-28 11:05 UTCVendor advisory
- 2026-10-28 11:05 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-27 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-27 10:49 UTCEG score recompute
- 2026-10-27 10:49 UTCVendor advisory
- 2026-10-27 10:49 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-26 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-26 10:34 UTCVendor advisory
Show 75 moreShow fewer
- 2026-10-26 10:34 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-25 18:17 UTCEG score recompute
- 2026-10-25 16:29 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-25 10:18 UTCEG score recompute
- 2026-10-25 10:18 UTCVendor advisory
- 2026-10-25 10:18 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-24 16:29 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-24 10:02 UTCEG score recompute
- 2026-10-24 10:02 UTCVendor advisory
- 2026-10-24 10:02 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-23 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-23 09:47 UTCEG score recompute
- 2026-10-23 09:47 UTCVendor advisory
- 2026-10-23 09:46 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-22 16:29 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-22 09:29 UTCEG score recompute
- 2026-10-22 09:28 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-21 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-21 09:13 UTCEG score recompute
- 2026-10-21 09:13 UTCVendor advisory
- 2026-10-21 09:13 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-20 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-20 08:57 UTCEG score recompute
- 2026-10-20 08:57 UTCVendor advisory
- 2026-10-20 08:56 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-19 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-19 08:41 UTCEG score recompute
- 2026-10-19 08:41 UTCVendor advisory
- 2026-10-19 08:41 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-18 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-18 08:25 UTCEG score recompute
- 2026-10-18 08:25 UTCVendor advisory
- 2026-10-18 08:25 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-17 16:29 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-17 08:09 UTCEG score recompute
- 2026-10-17 08:09 UTCVendor advisory
- 2026-10-17 08:09 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-16 16:34 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-16 07:54 UTCEG score recompute
- 2026-10-16 07:53 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-15 16:28 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-15 07:37 UTCEG score recompute
- 2026-10-15 07:37 UTCVendor advisory
- 2026-10-15 07:36 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-14 16:29 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-14 07:20 UTCEG score recompute
- 2026-10-14 07:20 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-13 16:28 UTCEPSS rescoreEPSS 8.8% · 95th percentile
- 2026-10-13 07:04 UTCVendor advisory
- 2026-10-13 07:03 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-12 19:04 UTCEG score recompute
- 2026-10-12 16:30 UTCEPSS rescoreEPSS 8.8% · 95th percentile
- 2026-10-12 06:48 UTCVendor advisory
- 2026-10-12 06:47 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-12 02:54 UTCVendor advisory
- 2026-10-12 02:54 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-11 23:02 UTCEG score recompute
- 2026-10-11 23:02 UTCVendor advisory
- 2026-10-11 23:01 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-11 19:10 UTCEG score recompute
- 2026-10-11 19:10 UTCVendor advisory
- 2026-10-11 19:09 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-11 15:19 UTCEG score recompute
- 2026-10-11 15:19 UTCVendor advisory
- 2026-10-11 15:19 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-11 13:44 UTCEPSS rescoreEPSS 8.8% · 95th percentile
- 2026-10-11 11:28 UTCEG score recompute
- 2026-10-11 11:28 UTCVendor advisory
- 2026-10-11 11:28 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-11 07:36 UTCVendor advisory
- 2026-10-11 07:36 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-11 03:46 UTCVendor advisory
- 2026-10-11 03:46 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
- 2026-10-10 23:55 UTCVendor advisory
- 2026-10-10 23:55 UTCGHSA enrichmentGHSA-q5p3-3mpm-hppr · GitHub severity HIGH · GitHub CVSS 7.1
Publicly available exploits
(3 references)Public exploit code is referenced for this CVE (1 Metasploit module, 2 GitHub PoCs). Defenders should treat patch urgency accordingly.
- Metasploitexploit/linux/local/cve_2022_0995_watch_queue✓ verifiedPublished Apr 21, 2022
Watch Queue Out of Bounds Write
Open source ↗ - GitHub PoC1nzag/CVE-2022-0995Published Jan 3, 2024
CVE-2022-0995 exploit
Open source ↗ - GitHub PoCBonfee/CVE-2022-0995Published Mar 26, 2022
CVE-2022-0995 exploit
Open source ↗
Related CVEs(same vendor + same CWE)
Same vendor
10 shownubuntu:USN-7455-1
Frequently asked(6)
What is CVE-2022-0995?
When was the CVE record for CVE-2022-0995 published?
Is CVE-2022-0995 actively exploited?
What is the CVSS score of CVE-2022-0995?
Which products are affected by CVE-2022-0995?
How do I remediate CVE-2022-0995?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-0995
Is Your Infrastructure Affected by CVE-2022-0995?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.