Out-of-bounds Read in Red Hat Enterprise Linux 10

CVE-2026-34003

A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosur…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (0.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-34003?
CVE-2026-34003 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2026-04-23.
How severe is CVE-2026-34003?
High severity. CVSS v3 base score is 7.8 out of 10.