A vulnerability, which was classified as problematic, has been found in Linux Kernel. This issue affects the function nilfs_attach_log_writer of the file fs/nilfs2/segment.c of the component BPF. The manipulation leads to memory leak. The attack may be initiated remotely. It is recommended to apply a patch to fix this issue. The identifier VDB-211961 was assigned to this vulnerability.
CVE-2022-3646
“▲” beside the score: it is higher than NVD's CVSS score.
Score 5.3 from GitHub Security Advisory published 2022-10-21. NVD baseline CVSS 4.3; sources differ by 1.0.
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 4.3
- EG Score
- 5.3MEDIUMmedium confidence
- EG Risk
- 24EG Risk 24/100
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)Severity53% × 45%Impact severity (EG Severity): CVSS 5.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.9% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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. - EPSS PROB
- 1.1%
- EPSS %ILE
- 65th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.
- EG Severity
- 5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 1.1% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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
Published
October 21, 2022
Last Modified
October 14, 2026
Advisory Details (4)
Auto-updated Oct 14, 2026[SECURITY] [DLA 3245-1] linux security update
https://lists.debian.org/debian-lts-announce/2022/12/msg00034.html[SECURITY] [DLA 3173-1] linux-5.10 security update
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.htmlnilfs2: fix leak of nilfs_root in case of writer thread creation failure - kernel/git/bpf/bpf-next.git - BPF next kernel tree
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=d0d51a97063db4704a5ef6bc978dddab1636a306Vendor Advisories for CVE-2022-3646(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(24)
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
(6 across 5 ecosystems)
Debian:10(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 4.19.118-1 ... 4.19.98-1~bpo9+1 (41 versions) |
| — |
| linux-5.10 | 5.10.136-1~deb10u1, 5.10.136-1~deb10u2, 5.10.136-1~deb10u3 |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 5.10.103-1 ... 5.10.92-2 (19 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(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(24)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
- UbuntuUSN-5791-1MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-5791-2MEDIUM
Linux kernel (Azure) vulnerabilities
- UbuntuUSN-5791-3MEDIUM
Linux kernel (Azure) vulnerabilities
- UbuntuUSN-5792-1MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-5792-2MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-5793-1MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-5793-2MEDIUM
Linux kernel (Azure) vulnerabilities
- UbuntuUSN-5793-3MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-5793-4MEDIUM
Linux kernel (IBM) vulnerabilities
- UbuntuUSN-5815-1MEDIUM
Linux kernel (BlueField) vulnerabilities
- UbuntuUSN-5854-1MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-5861-1MEDIUM
Linux kernel (Dell300x) vulnerabilities
- UbuntuUSN-5862-1MEDIUM
Linux kernel (Qualcomm Snapdragon) vulnerabilities
- UbuntuUSN-5865-1MEDIUM
Linux kernel (Azure) vulnerabilities
- UbuntuUSN-5877-1MEDIUM
Linux kernel (GKE) vulnerabilities
- UbuntuUSN-5883-1MEDIUM
Linux kernel (HWE) vulnerabilities
- UbuntuUSN-5919-1MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-5924-1MEDIUM
Linux kernel (Azure) vulnerabilities
- UbuntuUSN-5975-1MEDIUM
Linux kernel vulnerabilities
- UbuntuUSN-5976-1MEDIUM
Linux kernel (OEM) vulnerabilities
- UbuntuUSN-6001-1MEDIUM
Linux kernel (AWS) vulnerabilities
- UbuntuUSN-6007-1MEDIUM
Linux kernel (GCP) vulnerabilities
- UbuntuUSN-6013-1MEDIUM
Linux kernel (AWS) vulnerabilities
- UbuntuUSN-6014-1MEDIUM
Linux kernel vulnerabilities
Data Freshness Timeline
(refreshed 8× in last 7d / 39× 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 94 of 206 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. 6 repeat rows among the latest 100 are merged into the row they repeat. The 112 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-23 16:28 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-22 16:30 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-21 16:29 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-20 16:29 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-19 16:28 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-18 16:28 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-18 08:31 UTCEG score recompute
- 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-14 14:36 UTCEG score recompute
- 2026-10-14 14:36 UTCVendor advisory
- 2026-10-14 14:36 UTCGHSA enrichmentGHSA-h2j4-qp68-f436 · GitHub CVSS 5.3
- 2026-10-14 14:24 UTCNVD updateCVSS v3 → 4.3 · severity → MEDIUM
- 2026-10-14 13:57 UTCEG score recompute
- 2026-10-14 13:57 UTCGHSA enrichmentGHSA-h2j4-qp68-f436 · GitHub CVSS 5.3
- 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-12 18:50 UTCEG score recompute
- 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-11 23:14 UTCEG score recompute
- 2026-10-11 13:44 UTCEPSS rescoreEPSS 0.9% · 59th percentile
- 2026-10-10 19:56 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-09 20:04 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-08 16:40 UTCEPSS rescoreEPSS 0.9% · 58th percentile
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- 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-02 16:23 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-10-01 19:47 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-09-30 16:00 UTCEG score recompute
- 2026-09-30 15:00 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-09-29 15:16 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.9% · 58th percentile
- 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-24 07:48 UTCOSV refresh
- 2026-09-22 14:45 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-19 15:38 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-17 19:24 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-15 03:07 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-12 14:57 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-11 09:33 UTCEPSS rescoreEPSS 0.9% · 57th percentile
- 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-09-07 15:58 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-09-05 00:59 UTCOSV refresh
- 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-08-30 19:14 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-08-24 14:13 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.9% · 56th percentile
- 2026-08-20 22:52 UTCEPSS rescoreEPSS 0.9% · 55th percentile
- 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.9% · 55th percentile
- 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.9% · 55th percentile
- 2026-08-18 12:02 UTCOSV refresh
- 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.9% · 55th percentile
- 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.9% · 55th percentile
- 2026-08-16 02:11 UTCEPSS rescoreEPSS 0.9% · 55th percentile
- 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-11 13:39 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-10 14:08 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-04 15:07 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-04 10:35 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-03 07:27 UTCOSV refresh
- 2026-08-02 02:24 UTCEPSS rescoreEPSS 0.9% · 54th percentile
- 2026-08-01 04:13 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-30 16:25 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-30 01:28 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-28 15:33 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-26 14:52 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-25 14:15 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
- 2026-07-24 14:15 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
Related CVEs(same vendor + same CWE)
Same vendor
10 shownubuntu:USN-5791-1 · ubuntu:USN-5792-1 · ubuntu:USN-5793-1
Same CWE
10 shownCWE-404 · CWE-401
Frequently asked(5)
What is CVE-2022-3646?
When was the CVE record for CVE-2022-3646 published?
Is CVE-2022-3646 actively exploited?
What is the CVSS score of CVE-2022-3646?
How do I remediate CVE-2022-3646?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-3646
Is Your Infrastructure Affected by CVE-2022-3646?
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