CVE-2022-26495: Buffer Overflow
First published: Sun Mar 06 2022(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/nbd | <=1:3.23-3<=1:3.15.2-3 | 1:3.24-1 1:3.21-1+deb11u1 1:3.19-3+deb10u1 |
| debian/nbd | 1:3.19-3+deb10u1 1:3.21-1+deb11u1 1:3.24-1.1 1:3.25-1 | |
| 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 |
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2022-26495
- https://security-tracker.debian.org/tracker/CVE-2022-26496
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1006915
- https://lists.debian.org/nbd/2022/01/msg00037.html
- https://lists.debian.org/debian-lts-announce/2022/03/msg00014.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G2UPX62BIWOOHSACGUDB7E3O4URNN37F/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IZHR73XMAJTCFGKUZRXVTZKCK2X3IFNA/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PU5JFD4PEJED72TZLZ5R2Q2SFXICU5I5/
- https://sourceforge.net/projects/nbd/files/nbd/
- https://www.debian.org/security/2022/dsa-5100
- 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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G2UPX62BIWOOHSACGUDB7E3O4URNN37F/
- https://security.gentoo.org/glsa/202402-10
Frequently Asked Questions
What is CVE-2022-26495?
CVE-2022-26495 is a vulnerability in nbd-server in nbd before version 3.24 that allows an attacker to trigger a heap-based buffer overflow through an integer overflow.
What is the severity of CVE-2022-26495?
CVE-2022-26495 has a severity rating of 9.8 (Critical).
How does CVE-2022-26495 affect the NBD server in nbd?
CVE-2022-26495 affects nbd-server in nbd versions before 3.24, allowing an attacker to trigger a heap-based buffer overflow.
What software versions are affected by CVE-2022-26495?
CVE-2022-26495 affects nbd versions up to and including 3.23.
How can I fix CVE-2022-26495?
To fix CVE-2022-26495, update your nbd package to version 3.24 or higher.
- collector/debian-bugs
- alias/CVE-2022-26495
- collector/security-tracker-debian
- collector/nvd-index
- agent/weakness
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/last-modified-date
- agent/references
- agent/tags
- agent/author
- agent/event
- agent/description
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- package-manager/debian
- vendor/network block device project
- canonical/network block device project network block device
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- version/debian debian linux/11.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/34
- version/fedoraproject fedora/35
- version/fedoraproject fedora/36