CVE-2025-26597: Xorg: xwayland: buffer overflow in xkbchangetypesofkey()
First published: Wed Feb 12 2025(Updated: )
A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size.
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-2025-26597
- https://bugzilla.redhat.com/show_bug.cgi?id=2345255
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-26597
- https://nvd.nist.gov/vuln/detail/CVE-2025-26597
- https://launchpad.net/bugs/cve/CVE-2025-26597
- https://security-tracker.debian.org/tracker/CVE-2025-26597
- https://ubuntu.com/security/CVE-2025-26597
- https://lists.x.org/archives/xorg-announce/2025-February/003584.html
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/0e4ed94952b255c04fe910f6a1d9c852878dcd64
Frequently Asked Questions
What is the severity of CVE-2025-26597?
CVE-2025-26597 is classified as a medium-severity vulnerability due to its potential to cause a buffer overflow.
How do I fix CVE-2025-26597?
To mitigate CVE-2025-26597, update the affected xorg-server and xwayland packages to their latest versions as specified in the vulnerability description.
Which software is affected by CVE-2025-26597?
CVE-2025-26597 affects xorg-server versions up to 2:21.1.15-3 and xwayland versions up to 2:24.1.5-1.
What type of vulnerability is CVE-2025-26597?
CVE-2025-26597 is a buffer overflow vulnerability that occurs due to improper handling of the key symbols table in X.Org and Xwayland.
Can CVE-2025-26597 be exploited remotely?
Exploitation of CVE-2025-26597 may allow an attacker to execute arbitrary code, which could potentially be done remotely depending on the deployment scenario.
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