Vulnerability Details CVE-2025-26596
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 5.1%
CVSS Severity
CVSS v3 Score 7.8
References
- https://access.redhat.com/errata/RHSA-2025:2500
- https://access.redhat.com/errata/RHSA-2025:2502
- https://access.redhat.com/errata/RHSA-2025:2861
- https://access.redhat.com/errata/RHSA-2025:2862
- https://access.redhat.com/errata/RHSA-2025:2865
- https://access.redhat.com/errata/RHSA-2025:2866
- https://access.redhat.com/errata/RHSA-2025:2873
- https://access.redhat.com/errata/RHSA-2025:2874
- https://access.redhat.com/errata/RHSA-2025:2875
- https://access.redhat.com/errata/RHSA-2025:2879
- https://access.redhat.com/errata/RHSA-2025:2880
- https://access.redhat.com/security/cve/CVE-2025-26596
- https://bugzilla.redhat.com/show_bug.cgi?id=2345256
Products affected by CVE-2025-26596
-
cpe:2.3:a:tigervnc:tigervnc:-
-
cpe:2.3:a:x.org:x_server:-
-
cpe:2.3:a:x.org:xwayland:-
-
cpe:2.3:o:redhat:enterprise_linux:7.0
-
cpe:2.3:o:redhat:enterprise_linux:8.0
-
cpe:2.3:o:redhat:enterprise_linux:9.0