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CVE-2025-26596

Public on 2025-02-25
Modified on 2025-02-28
Description

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.

Severity
Medium
See what this means
CVSS v3 Base Score
4.5
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core xorg-x11-server 2025-03-08 23:17 ALAS2-2025-2791
Amazon Linux 2023 xorg-x11-server 2025-03-06 23:13 ALAS2023-2025-892
Amazon Linux 2023 xorg-x11-server-Xwayland 2025-03-06 23:13 ALAS2023-2025-891
Amazon Linux 2023 xorg-x11-server-Xwayland 2025-03-13 04:48 ALAS2023-2025-895

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Red Hat: CVE-2025-26596 Mitre: CVE-2025-26596 FAQs regarding Amazon Linux ALAS/CVE Severity