X.Org Server ProcDRI2GetBuffers overflow allows local privilege escalation
ZDI rates CVE-2026-50264 at 7.8; exploitation needs prior low-privileged code execution.
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CVE-2026-50264
- CVSS 3.1
- 7.8 high
- EPSS
- <1%p4
- Published
- ·
- Modified
Description · NVD
An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat. A client that requests multiple DRI2BufferBackLeft attachments and one DRI2BufferFrontLeft can trigger an out-of-bounds heap write. This may be used to crash the server, or for privilege escalation if the X server runs as root.
- Products
- x server, xwayland, enterprise linux
- Weakness
- CWE-787
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H