DEBIAN-CVE-2026-76781

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Source
https://security-tracker.debian.org/tracker/CVE-2026-76781
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-76781.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-76781
Upstream
Published
2026-09-17T16:17:42Z
Modified
2026-09-19T22:47:45Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a nextCatalog element lacks its mandatory catalog attribute, leading to the application crashing and causing a Denial of Service (DoS).

References

Affected packages

Debian:12 / libxml2

Package

Name
libxml2
Purl
pkg:deb/debian/libxml2?arch=source&distro=bookworm

Affected ranges

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

Affected versions

2.*
2.9.14+dfsg-1.2
2.9.14+dfsg-1.3~deb12u1
2.9.14+dfsg-1.3~deb12u2
2.9.14+dfsg-1.3~deb12u3
2.9.14+dfsg-1.3~deb12u4
2.9.14+dfsg-1.3~deb12u5
2.9.14+dfsg-1.3~deb12u6
2.9.14+dfsg-1.3
2.12.3+dfsg-0exp1
2.12.5+dfsg-0exp1
2.12.6+dfsg-0exp1
2.12.6+dfsg-0exp2
2.12.7+dfsg-1
2.12.7+dfsg-2
2.12.7+dfsg-3
2.12.7+dfsg+really2.9.14-0.1
2.12.7+dfsg+really2.9.14-0.2
2.12.7+dfsg+really2.9.14-0.3
2.12.7+dfsg+really2.9.14-0.4
2.12.7+dfsg+really2.9.14-1
2.12.7+dfsg+really2.9.14-2
2.12.7+dfsg+really2.9.14-2.1
2.13.1+dfsg-0exp1
2.13.3+dfsg-0exp1
2.13.3+dfsg-0exp2
2.14.1+dfsg-0exp1
2.14.2+dfsg-0exp1
2.14.3+dfsg-0exp1
2.14.3+dfsg-0exp2
2.14.3+dfsg-0exp3
2.14.4+dfsg-0exp1
2.14.5+dfsg-0exp1
2.14.5+dfsg-0exp2
2.14.5+dfsg-0.1
2.14.5+dfsg-0.2
2.14.6+dfsg-0.1
2.15.0+dfsg-0.1
2.15.0+dfsg-0.2
2.15.0+dfsg-0.3
2.15.1+dfsg-0.1
2.15.1+dfsg-0.2
2.15.1+dfsg-0.3
2.15.1+dfsg-0.4
2.15.1+dfsg-0.5
2.15.1+dfsg-1
2.15.1+dfsg-2
2.15.2+dfsg-0.1
2.15.3+dfsg-1
2.15.4+dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-76781.json"

Debian:13 / libxml2

Package

Name
libxml2
Purl
pkg:deb/debian/libxml2?arch=source&distro=trixie

Affected ranges

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

Affected versions

2.*
2.12.7+dfsg+really2.9.14-2.1
2.12.7+dfsg+really2.9.14-2.1+deb13u1
2.12.7+dfsg+really2.9.14-2.1+deb13u2
2.12.7+dfsg+really2.9.14-2.1+deb13u3
2.13.1+dfsg-0exp1
2.13.3+dfsg-0exp1
2.13.3+dfsg-0exp2
2.14.1+dfsg-0exp1
2.14.2+dfsg-0exp1
2.14.3+dfsg-0exp1
2.14.3+dfsg-0exp2
2.14.3+dfsg-0exp3
2.14.4+dfsg-0exp1
2.14.5+dfsg-0exp1
2.14.5+dfsg-0exp2
2.14.5+dfsg-0.1
2.14.5+dfsg-0.2
2.14.6+dfsg-0.1
2.15.0+dfsg-0.1
2.15.0+dfsg-0.2
2.15.0+dfsg-0.3
2.15.1+dfsg-0.1
2.15.1+dfsg-0.2
2.15.1+dfsg-0.3
2.15.1+dfsg-0.4
2.15.1+dfsg-0.5
2.15.1+dfsg-1
2.15.1+dfsg-2
2.15.2+dfsg-0.1
2.15.3+dfsg-1
2.15.4+dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-76781.json"

Debian:14 / libxml2

Package

Name
libxml2
Purl
pkg:deb/debian/libxml2?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.15.4+dfsg-1

Affected versions

2.*
2.12.7+dfsg+really2.9.14-2.1
2.13.1+dfsg-0exp1
2.13.3+dfsg-0exp1
2.13.3+dfsg-0exp2
2.14.1+dfsg-0exp1
2.14.2+dfsg-0exp1
2.14.3+dfsg-0exp1
2.14.3+dfsg-0exp2
2.14.3+dfsg-0exp3
2.14.4+dfsg-0exp1
2.14.5+dfsg-0exp1
2.14.5+dfsg-0exp2
2.14.5+dfsg-0.1
2.14.5+dfsg-0.2
2.14.6+dfsg-0.1
2.15.0+dfsg-0.1
2.15.0+dfsg-0.2
2.15.0+dfsg-0.3
2.15.1+dfsg-0.1
2.15.1+dfsg-0.2
2.15.1+dfsg-0.3
2.15.1+dfsg-0.4
2.15.1+dfsg-0.5
2.15.1+dfsg-1
2.15.1+dfsg-2
2.15.2+dfsg-0.1
2.15.3+dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-76781.json"