CVE-2026-88806 (GCVE-0-2026-88806)

Vulnerability from cvelistv5 – Published: 2026-09-21 13:42 – Updated: 2026-09-22 03:55
VLAI
Title
libX11 XkbGetMap Reply Heap-based Buffer Overflow
Summary
A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 00:00 UTC
CWE
  • CWE-122 - Heap-based buffer overflow
Assigner
suse CNA under the mitre root
CNA scorecard B 79/100 over 96 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
x.org libX11 Affected: 0 , < 1.8.14 (semver)
    cpe:2.3:a:x.org:libx11:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-18 13:33
Credits
Adam Bedard working with TrendAI Zero Day Initiative Claude:claude-opus-4-6
Show details on NVD website
To clipboard 

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