CVE-2025-26596
HIGH severity · CVSS 7.8 · Out-of-bounds write
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://access.redhat.com/errata/RHSA-2025:2500Advisory
- https://access.redhat.com/errata/RHSA-2025:2502Advisory
- https://access.redhat.com/errata/RHSA-2025:2861Advisory
- https://access.redhat.com/errata/RHSA-2025:2862Advisory
- https://access.redhat.com/errata/RHSA-2025:2865Advisory
- https://access.redhat.com/errata/RHSA-2025:2866Advisory
- https://access.redhat.com/errata/RHSA-2025:2873Advisory
- https://access.redhat.com/errata/RHSA-2025:2874Advisory