CVE-2026-88806

highpriority · track · 0EPSS 0.002 · 9 %ileDEFR

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.20% (9th) EPSS

CVSS 7.5 · high

Is it mine?

4 products

Who says so?

2 sources

cert_bund · certfr

EPSS · scored 2026-10-21

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

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · meissner@suse.deexploitability 1.6 · impact 5.9

v3.16.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

The CWE weakness classes this flaw belongs to.

Products and version ranges known to be affected.

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3503X.Org X11: Schwachstelle ermöglicht CodeausführungDeutsch2026-09-21csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in X.Org X11 ausnutzen, um potentiell Code zur Ausführung zu bringen.
CERTFR-2026-AVI-1333Multiples vulnérabilités dans le noyau Linux d'UbuntuFrançais2026-10-16vendor · certfrFR

Which sources assert this record, and when.

published 2026-09-21modified 2026-09-22

External citations — patches, advisories, analysis.

scry

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