DEBIAN-CVE-2026-0989
A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.
DEBIAN-CVE-2026-0989
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-0989
libxml2
Source reference: /affected/0/package/name
- Affected versions
- 2.9.14+dfsg-1.2
Source reference:
/affected/0/versions2.9.14+dfsg-1.3~deb12u1Source reference:
/affected/0/versions2.9.14+dfsg-1.3~deb12u2Source reference:
/affected/0/versions2.9.14+dfsg-1.3~deb12u3Source reference:
/affected/0/versions2.9.14+dfsg-1.3~deb12u4Source reference:
/affected/0/versions2.9.14+dfsg-1.3~deb12u5Source reference:
/affected/0/versions - Fixed versions
- 2.9.14+dfsg-1.3~deb12u6
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
libxml2
Source reference: /affected/1/package/name
- Affected versions
- 2.12.7+dfsg+really2.9.14-2.1
Source reference:
/affected/1/versions2.12.7+dfsg+really2.9.14-2.1+deb13u1Source reference:
/affected/1/versions2.12.7+dfsg+really2.9.14-2.1+deb13u2Source reference:
/affected/1/versions - Fixed versions
- 2.12.7+dfsg+really2.9.14-2.1+deb13u3
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
libxml2
Source reference: /affected/2/package/name
- Affected versions
- 2.12.7+dfsg+really2.9.14-2.1
Source reference:
/affected/2/versions2.13.1+dfsg-0exp1Source reference:
/affected/2/versions2.13.3+dfsg-0exp1Source reference:
/affected/2/versions2.13.3+dfsg-0exp2Source reference:
/affected/2/versions2.14.1+dfsg-0exp1Source reference:
/affected/2/versions2.14.2+dfsg-0exp1Source reference:
/affected/2/versions2.14.3+dfsg-0exp1Source reference:
/affected/2/versions2.14.3+dfsg-0exp2Source reference:
/affected/2/versions2.14.3+dfsg-0exp3Source reference:
/affected/2/versions2.14.4+dfsg-0exp1Source reference:
/affected/2/versions2.14.5+dfsg-0.1Source reference:
/affected/2/versions2.14.5+dfsg-0.2Source reference:
/affected/2/versions2.14.5+dfsg-0exp1Source reference:
/affected/2/versions2.14.5+dfsg-0exp2Source reference:
/affected/2/versions2.14.6+dfsg-0.1Source reference:
/affected/2/versions2.15.0+dfsg-0.1Source reference:
/affected/2/versions2.15.0+dfsg-0.2Source reference:
/affected/2/versions2.15.0+dfsg-0.3Source reference:
/affected/2/versions2.15.1+dfsg-0.1Source reference:
/affected/2/versions2.15.1+dfsg-0.2Source reference:
/affected/2/versions2.15.1+dfsg-0.3Source reference:
/affected/2/versions2.15.1+dfsg-0.4Source reference:
/affected/2/versions2.15.1+dfsg-0.5Source reference:
/affected/2/versions2.15.1+dfsg-1Source reference:
/affected/2/versions2.15.1+dfsg-2Source reference:
/affected/2/versions - Fixed versions
- 2.15.2+dfsg-0.1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.9.14+dfsg-1.3~deb12u6"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:deb/debian/libxml2?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-0989.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.12.7+dfsg+really2.9.14-2.1+deb13u3"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:deb/debian/libxml2?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-0989.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.15.2+dfsg-0.1"
}
]
}
],
"package": {
"name": "libxml2",
"purl": "pkg:deb/debian/libxml2?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"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-0.1",
"2.14.5+dfsg-0.2",
"2.14.5+dfsg-0exp1",
"2.14.5+dfsg-0exp2",
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-0989.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55408 · Revision 1
- Added to Heist Feed
- Publisher date