DEBIAN-CVE-2026-33999

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Source
https://security-tracker.debian.org/tracker/CVE-2026-33999
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33999.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-33999
Upstream
  • CVE-2026-33999
Published
2026-04-23T16:16:24Z
Modified
2026-09-14T17:03:29Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other severe impacts.

References

Affected packages

Debian:12
xorg-server

Package

Name
xorg-server
Purl
pkg:deb/debian/xorg-server?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2:21.1.7-3+deb12u12

Affected versions

2:21.*
2:21.1.7-3
2:21.1.7-3+deb12u1
2:21.1.7-3+deb12u2
2:21.1.7-3+deb12u3
2:21.1.7-3+deb12u4
2:21.1.7-3+deb12u5
2:21.1.7-3+deb12u6
2:21.1.7-3+deb12u7
2:21.1.7-3+deb12u8
2:21.1.7-3+deb12u9
2:21.1.7-3+deb12u10
2:21.1.7-3+deb12u11

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33999.json"
xwayland

Package

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

Affected ranges

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

Affected versions

2:22.*
2:22.1.9-1
2:23.*
2:23.1.0-1
2:23.1.1-1
2:23.2.0-1
2:23.2.1-1
2:23.2.2-1
2:23.2.3-1
2:23.2.4-1
2:23.2.6-1
2:24.*
2:24.0.99.901-1
2:24.1.0-1
2:24.1.2-1
2:24.1.3-1
2:24.1.4-1
2:24.1.4-2
2:24.1.4-3
2:24.1.5-1
2:24.1.6-1
2:24.1.8-1
2:24.1.9-1
2:24.1.10-1
2:24.1.11-1
2:24.1.12-1
2:24.1.13-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33999.json"
Debian:13
xorg-server

Package

Name
xorg-server
Purl
pkg:deb/debian/xorg-server?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2:21.1.16-1.3+deb13u2

Affected versions

2:21.*
2:21.1.16-1.3
2:21.1.16-1.3+deb13u1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33999.json"
xwayland

Package

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

Affected ranges

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

Affected versions

2:24.*
2:24.1.6-1
2:24.1.8-1
2:24.1.9-1
2:24.1.10-1
2:24.1.11-1
2:24.1.12-1
2:24.1.13-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33999.json"
Debian:14
xorg-server

Package

Name
xorg-server
Purl
pkg:deb/debian/xorg-server?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2:21.1.22-1

Affected versions

2:21.*
2:21.1.16-1.3
2:21.1.18-1
2:21.1.18-2
2:21.1.20-1
2:21.1.21-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33999.json"
xwayland

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2:24.1.10-1

Affected versions

2:24.*
2:24.1.6-1
2:24.1.8-1
2:24.1.9-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33999.json"