What’s Vulnerable › Vulnerabilities

CVE-2022-3550: X.org Server xkb.c _GetCountedString buffer overflow

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-10-17 · updated 2026-06-17
• Weakness: CWE-119

Description

A vulnerability classified as critical was found in X.org Server. Affected by this vulnerability is the function _GetCountedString of the file xkb/xkb.c. The manipulation leads to buffer overflow. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-211051.

Affected products

• Debian Linux: 10.0, 11.0
• Fedoraproject Fedora: 35, 36, 37
• xorg-x11-server: before 21.1.6 — fixed in 21.1.6

How to fix

Upgrade to a fixed version: xorg-x11-server 21.1.6. Check the vendor advisory for mitigations.

References

• https://cgit.freedesktop.org/xorg/xserver/commit/?id=11beef0b7f1ed290348e45618e5fa0d2bffcb72e
• https://lists.debian.org/debian-lts-announce/2022/11/msg00012.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTPFVGYTOY4EWTJEBH3YGDTTU57FZAK/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IOEDFBYPSE3EMVHTEFCVEJD2R2Y5F2A5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OXZZ6JBDBVBYPDI6DUTY6N36GNW37YHK/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X7W3NXSYK4P3XCZQBI3U6UWP4DPZIMRZ/
• https://security.gentoo.org/glsa/202305-30
• https://vuldb.com/?id.211051
• https://www.debian.org/security/2022/dsa-5278
• https://cgit.freedesktop.org/xorg/xserver/commit/?id=11beef0b7f1ed290348e45618e5fa0d2bffcb72e
• https://lists.debian.org/debian-lts-announce/2022/11/msg00012.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTPFVGYTOY4EWTJEBH3YGDTTU57FZAK/

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