LOWCVSS v3.1 3.3Vulnerability
CVE-2026-121604
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.
Properties
- Severity
- LOW
- Nvd fetched at
- 2026-11-03T17:20:13.885968+00:00
- Cvss severity
- LOW
- Cvss score
- 3.3
- Retrieved at
- 2026-11-03T17:21:19+00:00
- Score
- 3.3
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2026-121604
- Cvss vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- First seen by Signal
- 2026-11-03T17:21:19+00:00
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Published at
- 2026-11-03T17:18:11.737
- Last modified
- 2026-11-03T17:18:11.737
Related Entities (1)
HAS_WEAKNESS (1)
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