CVE-2026-88807 PUBLISHED

libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow

Assigner: suse
Reserved: 10.09.2026 Published: 21.09.2026 Updated: 21.09.2026

A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score: 8.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	High	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	Active

CVSS 4.0

Vendor	X.org
Product	libXrender
Versions	Default: unaffected affected from 0 to 0.9.13 (excl.)