What is CVE-2022-43945?

CVE-2022-43945 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10. CVE-2022-43945 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-43945?

CVE-2022-43945 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2022-43945?

No patch is currently available for CVE-2022-43945. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2022-43945 actively exploited?

CVE-2022-43945 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2022-43945

High

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

Package Linux Kernel

Published 2022-11-04

Last modified 2026-05-12

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-131

CVE-2022-43945 is classified as CWE-131

See CWE-131 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2022-43945 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Packet Storm
http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LNS-0092-1.html
Security
https://security.netapp.com/advisory/ntap-20221215-0006/

Third Party Advisory
Cert-Portal
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f90497a16e434c2211c66e3de8e77b17868382b8
Patch

Details

CVE ID CVE-2022-43945

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2022-11-04

Modified 2026-05-12

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2022-43945?

CVE-2022-43945 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . CVE-2022-43945 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-43945?

CVE-2022-43945 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2022-43945?

No patch is currently available for CVE-2022-43945. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2022-43945 actively exploited?

No — CVE-2022-43945 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.