CVE-2022-26495

Name: CVE-2022-26495
Creator: NVD / NIST
Published: 2022-03-06T06:15:07.303+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.74%

Last modified Jun 17, 2026

CVE-2022-26495 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated for the name, resulting in a write to a dangling pointer. EPSS estimates a 2.74% chance of exploitation in the next 30 days.

Description

In nbd-server in nbd before 3.24, there is an integer overflow with a resultant heap-based buffer overflow. A value of 0xffffffff in the name length field will cause a zero-sized buffer to be allocated for the name, resulting in a write to a dangling pointer. This issue exists for the NBD_OPT_INFO, NBD_OPT_GO, and NBD_OPT_EXPORT_NAME messages.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.74%

84.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Network Block Device Project	Network Block Device	< 3.24
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0
Fedoraproject	Fedora	34
Fedoraproject	Fedora	35
Fedoraproject	Fedora	36

References

https://lists.debian.org/debian-lts-announce/2022/03/msg00014.htmlMailing List, Third Party Advisory
https://lists.debian.org/nbd/2022/01/msg00037.htmlExploit, Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G2UPX62BIWOOHSACGUDB7E3O4URNN37F/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZHR73XMAJTCFGKUZRXVTZKCK2X3IFNA/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PU5JFD4PEJED72TZLZ5R2Q2SFXICU5I5/
https://security.gentoo.org/glsa/202402-10
https://sourceforge.net/projects/nbd/files/nbd/Product, Release Notes, Third Party Advisory
https://www.debian.org/security/2022/dsa-5100Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00014.htmlMailing List, Third Party Advisory
https://lists.debian.org/nbd/2022/01/msg00037.htmlExploit, Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G2UPX62BIWOOHSACGUDB7E3O4URNN37F/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZHR73XMAJTCFGKUZRXVTZKCK2X3IFNA/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PU5JFD4PEJED72TZLZ5R2Q2SFXICU5I5/
https://security.gentoo.org/glsa/202402-10
https://sourceforge.net/projects/nbd/files/nbd/Product, Release Notes, Third Party Advisory
https://www.debian.org/security/2022/dsa-5100Third Party Advisory

Timeline

Published: Mar 6, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-26495?

How severe is CVE-2022-26495?

CVE-2022-26495 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.74% probability of exploitation in the next 30 days.

How do I fix CVE-2022-26495?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-26495?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST