CVE-2026-88806

Severity: Important

Published: 2026-09-21

A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.

Exploit evidence

No public exploit evidence reported by NVD

Last checked: 2026-09-22 21:40 UTC

No exploitation evidence · CISA Coordinator (Assessed 2026-09-21 00:00 UTC)

NVD evidence for CVE-2026-88806 is reported, not independently verified by Package Alert. It does not establish exploit reliability or applicability to a particular package or environment.

References

Fix Status by Distribution

Fix evidence last checked: 2026-10-02 11:31 UTC

Fixed in:

SUSE Linux Enterprise Server 12 SP5
- SUSE-SU-2026:4410 · Published 2026-10-01
SUSE Linux Enterprise Server 16
- SUSE-SU-2026:23899 · Published 2026-09-22

No fix evidence found:

AlmaLinux 10

AlmaLinux 8

AlmaLinux 9

Debian 11 (Bullseye)

Debian 12 (Bookworm)

Debian 13 (Trixie)

Oracle Linux 10

Oracle Linux 8

Oracle Linux 9

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 7 (Extended Lifecycle Support)

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

Rocky Linux 10

Rocky Linux 8

Rocky Linux 9

SUSE Linux Enterprise Server 15 SP5

SUSE Linux Enterprise Server 15 SP6

SUSE Linux Enterprise Server 15 SP7

Ubuntu 22.04 LTS (Jammy Jellyfish)

Ubuntu 24.04 LTS (Noble Numbat)

Ubuntu 25.04 (Plucky Puffin)

Ubuntu 25.10 (Questing Quokka)

Ubuntu 26.04 LTS (Resolute Raccoon)

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