CVE-2026-50262: redhat enterprise_linux Out-of-bounds Read

Vulnerability summary

CVE-2026-50262 is a medium (CVSS 5.5) Out-of-bounds Read vulnerability in redhat enterprise_linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.5% of scored vulnerabilities.

Timeline

1. 05-06-2026
   PublishedVulnerability first disclosed.
2. 28-09-2026
   Last modifiedVulnerability information updated.

Description

An out-of-bounds read flaw was found in the X.Org X server and Xwayland in __glXDisp_ChangeDrawableAttributes(). A wrong size validation check can read a client-controlled number of bytes, exceeding the request buffer, leading to information disclosure. A write path also exists but requires byte-swapped clients which is disabled by default.

• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.