Bug 2566067 (CVE-2026-121604) - CVE-2026-121604 wlroots: wlroots: Information disclosure via out-of-bounds read in read_surface_class()
Summary: CVE-2026-121604 wlroots: wlroots: Information disclosure via out-of-bounds re...
Keywords:
Status: NEW
Alias: CVE-2026-121604
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-03 18:13 UTC by OSIDB Bzimport
Modified: 2026-11-03 18:34 UTC (History)
0 users

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Description OSIDB Bzimport 2026-11-03 18:13:07 UTC 
wlroots before 0.20.2 contains an out-of-bounds read vulnerability in read_surface_class() in xwayland/xwm.c that allows local X11 clients to leak compositor heap memory. Attackers can set a WM_CLASS property with a NUL-terminated instance but unterminated class, exposing over-read heap bytes as the window class or app_id over IPC.
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