Fluid Attacks Database

Description

A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Package	Affected version	Patched versions
debian 13	xorg-server	>=0 <2:21.1.16-1	2:21.1.16-1
debian 14	xwayland	>=0 <2:24.1.6-1	2:24.1.6-1
debian 11	xorg-server	=2:1.20.11-1 \|\| =2:1.20.11-1+deb11u1 \|\| =2:1.20.11-1+deb11u10 \|\| =2:1.20.11-1+deb11u11 \|\| =2:1.20.11-1+deb11u12 \|\| =2:1.20.11-1+deb11u13 \|\| =2:1.20.11-1+deb11u14 \|\| =2:1.20.11-1+deb11u2 \|\| =2:1.20.11-1+deb11u3 \|\| =2:1.20.11-1+deb11u4 \|\| =2:1.20.11-1+deb11u5 \|\| =2:1.20.11-1+deb11u6 \|\| =2:1.20.11-1+deb11u7 \|\| =2:1.20.11-1+deb11u8 \|\| =2:1.20.11-1+deb11u9 \|\| >=0 <2:1.20.11-1+deb11u15	2:1.20.11-1+deb11u15
debian 12	xorg-server	=2:21.1.7-3 \|\| =2:21.1.7-3+deb12u1 \|\| =2:21.1.7-3+deb12u2 \|\| =2:21.1.7-3+deb12u3 \|\| =2:21.1.7-3+deb12u4 \|\| =2:21.1.7-3+deb12u5 \|\| =2:21.1.7-3+deb12u6 \|\| =2:21.1.7-3+deb12u7 \|\| =2:21.1.7-3+deb12u8 \|\| >=0 <2:21.1.7-3+deb12u9	2:21.1.7-3+deb12u9
debian 14	xorg-server	>=0 <2:21.1.16-1	2:21.1.16-1
debian 12	xwayland	=2:22.1.9-1 \|\| =2:23.1.0-1 \|\| =2:23.1.1-1 \|\| =2:23.2.0-1 \|\| =2:23.2.1-1 \|\| =2:23.2.2-1 \|\| =2:23.2.3-1 \|\| =2:23.2.4-1 \|\| =2:23.2.6-1 \|\| =2:24.0.99.901-1 \|\| =2:24.1.0-1 \|\| =2:24.1.10-1 \|\| =2:24.1.11-1 \|\| =2:24.1.2-1 \|\| =2:24.1.3-1 \|\| =2:24.1.4-1 \|\| =2:24.1.4-2 \|\| =2:24.1.4-3 \|\| =2:24.1.5-1 \|\| =2:24.1.6-1 \|\| =2:24.1.8-1 \|\| =2:24.1.9-1	-
debian 13	xwayland	>=0 <2:24.1.6-1	2:24.1.6-1
rpm rhel6	xorg-x11-server	-	-
rpm rhel10	xorg-x11-server-Xwayland	<0:24.1.5-3.el10_0	0:24.1.5-3.el10_0
rpm rhel9.4	tigervnc	<0:1.13.1-8.el9_4.5	0:1.13.1-8.el9_4.5

1-10 of 18

Aliases

1. CVE-2025-265952. NVD-2025-265953. OSV-DEBIAN-2025-265954. OSV-2025-265955. SECURITY-TRACKER-CVE-2025-26595

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