CVE-2025-26596: Xorg: xwayland: heap overflow in xkbwritekeysyms()
First published: Wed Feb 12 2025(Updated: )
A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/xorg-server | <=2:1.20.11-1+deb11u13<=2:21.1.7-3+deb12u8<=2:21.1.15-3 | 2:1.20.11-1+deb11u15 2:21.1.7-3+deb12u9 2:21.1.16-1 |
| debian/xwayland | <=2:22.1.9-1<=2:24.1.5-1 | 2:24.1.6-1 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2025-26596
- https://bugzilla.redhat.com/show_bug.cgi?id=2345256
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-26596
- https://nvd.nist.gov/vuln/detail/CVE-2025-26596
- https://launchpad.net/bugs/cve/CVE-2025-26596
- https://security-tracker.debian.org/tracker/CVE-2025-26596
- https://ubuntu.com/security/CVE-2025-26596
- https://lists.x.org/archives/xorg-announce/2025-February/003584.html
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/80d69f01423fc065c950e1ff4e8ddf9f675df773
Frequently Asked Questions
What is the severity of CVE-2025-26596?
CVE-2025-26596 is classified as a high severity vulnerability due to the potential for a heap-based buffer overflow.
What systems are affected by CVE-2025-26596?
CVE-2025-26596 affects the xorg-server and xwayland packages on Debian systems.
How do I fix CVE-2025-26596?
To fix CVE-2025-26596, update the affected xorg-server and xwayland packages to their latest versions as recommended by your distribution.
What kind of attack can exploit CVE-2025-26596?
CVE-2025-26596 could be exploited through local code execution leading to potential unauthorized access or system compromise.
When was CVE-2025-26596 last updated?
CVE-2025-26596 was last updated on 25 February 2025.
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