CVE-2022-43945

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-11-05. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 21%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
97.3%
KEV
Not listed

Published

November 4, 2022

Last Modified

May 12, 2026

References (7)

Vendor Advisories for CVE-2022-43945(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(28)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-lowlatency (4.4.0.236.242) @ xenial2026-05-22ubuntu
ubuntulinux-tools-aws-hwe (4.15.0.1148.133) @ xenial2026-05-22ubuntu
ubuntulinux-tools-4.15.0-1143-gcp (4.15.0-1143.159) @ bionic2026-05-22ubuntu
ubuntulinux-oracle-headers-4.15.0-1113 (4.15.0-1113.124~16.04.1) @ xenial2026-05-22ubuntu
ubuntulinux-image-ibm-edge (5.4.0.1042.53) @ bionic2026-05-22ubuntu
ubuntulinux-image-raspi2-hwe-18.04 (5.4.0.1079.109) @ focal2026-05-22ubuntu
ubuntulinux-buildinfo-5.4.0-1101-azure (5.4.0-1101.107) @ focal2026-05-22ubuntu
ubuntulinux-dell300x-headers-4.15.0-1060 (4.15.0-1060.65) @ bionic2026-05-22ubuntu
ubuntulinux-signed-image-azure (4.15.0.1159.144) @ xenial2026-05-22ubuntu
ubuntulinux-image-unsigned-5.4.0-1094-gke (5.4.0-1094.101) @ focal2026-05-22ubuntu
ubuntulinux-buildinfo-6.0.0-1012-oem (6.0.0-1012.12) @ jammy2026-05-22ubuntu
ubuntulinux-headers-bluefield (5.4.0.1058.53) @ focal2026-05-22ubuntu
ubuntulowlatency-4.4 (4.4.0-168) @ xenial2026-05-22ubuntu
ubuntulinux-virtual-hwe-22.04-edge (5.19.0.26.23) @ kinetic2026-05-22ubuntu
ubuntulinux-tools-5.15.0-1021-ibm (5.15.0-1021.24) @ jammy2026-05-22ubuntu
ubuntulinux-cloud-tools-5.19.0-1013-azure (5.19.0-1013.14) @ kinetic2026-05-22ubuntu
ubuntulinux-image-unsigned-5.15.0-1023-gke (5.15.0-1023.28) @ jammy2026-05-22ubuntu
ubuntulinux-oem-5.14-tools-host (5.14.0-1055.62) @ focal2026-05-22ubuntu
ubuntulinux-headers-oem-22.04 (5.17.0.1024.22) @ jammy2026-05-22ubuntu
ubuntulinux-headers-azure-fde (5.15.0.1029.36.6) @ jammy2026-05-22ubuntu
ubuntulinux-modules-4.4.0-1153-aws (4.4.0-1153.168) @ xenial2026-05-22ubuntu
redhatkernel-0:4.18.0-425.13.1.el8_72023-02-21redhat
redhatkernel-rt-0:4.18.0-425.13.1.rt7.223.el8_72023-02-21redhat
redhatkpatch-patch2023-02-21redhat
redhatkernel-0:5.14.0-162.12.1.el9_12023-01-23redhat
redhatkernel-rt-0:5.14.0-162.12.1.rt21.175.el9_12023-01-23redhat
redhatkernel-rt-0:5.14.0-70.36.1.rt21.108.el9_02022-12-13redhat
redhatkernel-0:5.14.0-70.36.1.el9_02022-12-13redhat

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.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(22)

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.

Data Freshness Timeline

(refreshed 9× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 124 total refreshes for this CVE.

  1. 2026-07-22 14:06 UTCEPSS rescore
  2. 2026-07-21 15:23 UTCEPSS rescore
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  43. 2026-06-05 09:30 UTCOSV refresh
  44. 2026-06-05 06:09 UTCEPSS rescore
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  74. 2026-05-22 06:39 UTCEG score recompute
  75. 2026-05-22 06:39 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2022-43945?
CVE-2022-43945 is a high vulnerability published on November 4, 2022. The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send…
When was CVE-2022-43945 disclosed?
CVE-2022-43945 was first published in the National Vulnerability Database on November 4, 2022, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-43945 actively exploited?
CVE-2022-43945 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-43945?
CVE-2022-43945 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2022-43945?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-43945, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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