DEBIAN-CVE-2026-88806

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Source
https://security-tracker.debian.org/tracker/CVE-2026-88806
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88806.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-88806
Upstream
  • CVE-2026-88806
Published
2026-09-21T14:17:22Z
Modified
2026-09-23T08:47:32Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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

References

Affected packages

Debian:12 / libx11

Package

Name
libx11
Purl
pkg:deb/debian/libx11?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2:1.*
2:1.8.4-2
2:1.8.4-2+deb12u1
2:1.8.4-2+deb12u2
2:1.8.6-1
2:1.8.7-1
2:1.8.10-1
2:1.8.10-2
2:1.8.12-1
2:1.8.13-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88806.json"

Debian:13 / libx11

Package

Name
libx11
Purl
pkg:deb/debian/libx11?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2:1.*
2:1.8.12-1
2:1.8.13-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88806.json"

Debian:14 / libx11

Package

Name
libx11
Purl
pkg:deb/debian/libx11?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2:1.*
2:1.8.12-1
2:1.8.13-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88806.json"