CVE-2026-56000
9
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Summary
Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| X.Org | xorg-x11-server | 0 < 21.1.24 | affected |
| X.Org | xwayland | 0 < 24.1.13 | affected |
Weaknesses
- CWE-416: CWE-416 Use after free
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/2779affbdb4354e894f490e56f962527d6125043
- https://www.openwall.com/lists/oss-security/2026/07/08/2
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