CVE catalog

CVE-2017-9047

libxml2: CVE-2017-9047

Severity: High · CVSS 7.5CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: May 15, 2017, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 3.16% · Oct 27, 2026

A buffer overflow was discovered in libxml2 20904-GITv2.9.4-16-g0741801. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer 'buf' of size 'size'. The variable len is assigned strlen(buf). If the content->type is XML_ELEMENT_CONTENT_ELEMENT, then (i) the content->prefix is appended to buf (if it actually fits) whereupon (ii) content->name is written to the buffer. However, the check for whether the content->name actually fits also uses 'len' rather than the updated buffer length strlen(buf). This allows us to write about "size" many bytes beyond the allocated memory. This vulnerability causes programs that use libxml2, such as PHP, to crash.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	libxml2	sid	`2.15.4+dfsg-1`	fixed
Debian	libxml2	forky	`2.15.4+dfsg-1`	fixed
Debian	libxml2	trixie	`2.12.7+dfsg+really2.9.14-2.1+deb13u3`	fixed
Debian	libxml2	trixie-security	`2.12.7+dfsg+really2.9.14-2.1+deb13u1`	fixed
Debian	libxml2	bookworm	`2.9.14+dfsg-1.3~deb12u6`	fixed
Debian	libxml2	bookworm-security	`2.9.14+dfsg-1.3~deb12u4`	fixed
Cpe	libxml2	Not reported	Not reported	unknown
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu2`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu3`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4.1`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4.2`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4.3`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4.4`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4.5`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4.6`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4.7`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4.8`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4.9`	vulnerable
Ubuntu	libxml2	14.04	`2.9.1+dfsg1-3ubuntu4.10`	fixed
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4`	vulnerable
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4ubuntu1`	vulnerable
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4ubuntu2`	vulnerable
Ubuntu	libxml2	16.04	`2.9.2+zdfsg1-4ubuntu3`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.1`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.2`	vulnerable
Ubuntu	libxml2	16.04	`2.9.3+dfsg1-1ubuntu0.3`	fixed
Suse	libxml2	linux enterprise desktop 12 sp2	`2.9.4-39.2`	fixed
Suse	python-libxml2	linux enterprise desktop 12 sp2	`2.9.4-39.2`	fixed
Suse	libxml2	linux enterprise server for raspberry pi 12 sp2	`2.9.4-39.2`	fixed
Suse	python-libxml2	linux enterprise server for raspberry pi 12 sp2	`2.9.4-39.2`	fixed
Suse	libxml2	linux enterprise software development kit 12 sp2	`2.9.4-39.2`	fixed
Suse	libxml2	linux enterprise server 12 sp2	`2.9.4-39.2`	fixed
Suse	python-libxml2	linux enterprise server 12 sp2	`2.9.4-39.2`	fixed
Suse	libxml2	linux enterprise server for sap applications 12 sp2	`2.9.4-39.2`	fixed
Suse	python-libxml2	linux enterprise server for sap applications 12 sp2	`2.9.4-39.2`	fixed
Suse	libxml2	linux enterprise server for sap applications 12	`2.9.1-26.15.1`	fixed
Suse	python-libxml2	linux enterprise server for sap applications 12	`2.9.1-26.15.1`	fixed
Suse	libxml2	linux enterprise server for sap applications 12 sp1	`2.9.1-26.15.1`	fixed
Suse	python-libxml2	linux enterprise server for sap applications 12 sp1	`2.9.1-26.15.1`	fixed
Suse	libxml2	linux enterprise server 12-ltss	`2.9.1-26.15.1`	fixed
Suse	python-libxml2	linux enterprise server 12-ltss	`2.9.1-26.15.1`	fixed
Suse	libxml2	linux enterprise server 12 sp1-ltss	`2.9.1-26.15.1`	fixed
Suse	python-libxml2	linux enterprise server 12 sp1-ltss	`2.9.1-26.15.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libxml2	source	sid	`2.9.4+dfsg1-3.1`	not yet assigned	Not reported	[863022]
Debian	libxml2	source	forky	`2.9.4+dfsg1-3.1`	not yet assigned	Not reported	[863022]
Debian	libxml2	source	trixie	`2.9.4+dfsg1-3.1`	not yet assigned	Not reported	[863022]
Debian	libxml2	source	bookworm	`2.9.4+dfsg1-3.1`	not yet assigned	Not reported	[863022]
Ubuntu	libxml2	deb	14.04	`2.9.1+dfsg1-3ubuntu4.10`	Not reported	UBUNTU-CVE-2017-9047	Not reported
Ubuntu	libxml2	deb	16.04	`2.9.3+dfsg1-1ubuntu0.3`	Not reported	UBUNTU-CVE-2017-9047	Not reported
Suse	libxml2	rpm	linux enterprise desktop 12 sp2	`2.9.4-39.2`	Not reported	SUSE-SU-2017:1538-1	Not reported
Suse	python-libxml2	rpm	linux enterprise desktop 12 sp2	`2.9.4-39.2`	Not reported	SUSE-SU-2017:1538-1	Not reported
Suse	libxml2	rpm	linux enterprise server for raspberry pi 12 sp2	`2.9.4-39.2`	Not reported	SUSE-SU-2017:1538-1	Not reported
Suse	python-libxml2	rpm	linux enterprise server for raspberry pi 12 sp2	`2.9.4-39.2`	Not reported	SUSE-SU-2017:1538-1	Not reported
Suse	libxml2	rpm	linux enterprise software development kit 12 sp2	`2.9.4-39.2`	Not reported	SUSE-SU-2017:1538-1	Not reported
Suse	libxml2	rpm	linux enterprise server 12 sp2	`2.9.4-39.2`	Not reported	SUSE-SU-2017:1538-1	Not reported
Suse	python-libxml2	rpm	linux enterprise server 12 sp2	`2.9.4-39.2`	Not reported	SUSE-SU-2017:1538-1	Not reported
Suse	libxml2	rpm	linux enterprise server for sap applications 12 sp2	`2.9.4-39.2`	Not reported	SUSE-SU-2017:1538-1	Not reported
Suse	python-libxml2	rpm	linux enterprise server for sap applications 12 sp2	`2.9.4-39.2`	Not reported	SUSE-SU-2017:1538-1	Not reported
Suse	libxml2	rpm	linux enterprise server for sap applications 12	`2.9.1-26.15.1`	Not reported	SUSE-SU-2017:1587-1	Not reported
Suse	python-libxml2	rpm	linux enterprise server for sap applications 12	`2.9.1-26.15.1`	Not reported	SUSE-SU-2017:1587-1	Not reported
Suse	libxml2	rpm	linux enterprise server for sap applications 12 sp1	`2.9.1-26.15.1`	Not reported	SUSE-SU-2017:1587-1	Not reported
Suse	python-libxml2	rpm	linux enterprise server for sap applications 12 sp1	`2.9.1-26.15.1`	Not reported	SUSE-SU-2017:1587-1	Not reported
Suse	libxml2	rpm	linux enterprise server 12-ltss	`2.9.1-26.15.1`	Not reported	SUSE-SU-2017:1587-1	Not reported
Suse	python-libxml2	rpm	linux enterprise server 12-ltss	`2.9.1-26.15.1`	Not reported	SUSE-SU-2017:1587-1	Not reported
Suse	libxml2	rpm	linux enterprise server 12 sp1-ltss	`2.9.1-26.15.1`	Not reported	SUSE-SU-2017:1587-1	Not reported
Suse	python-libxml2	rpm	linux enterprise server 12 sp1-ltss	`2.9.1-26.15.1`	Not reported	SUSE-SU-2017:1587-1	Not reported

[Debian bug #863022]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libxml2]Unknown
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
[libxml2-dev]Unknown
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
[libxml2-doc]Unknown
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · all · bookworm
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · all · bookworm
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · all · bookworm-security
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · all · bookworm-security
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
[libxml2-utils]Unknown
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
[python3-libxml2]Unknown
Source package: [libxml2]
Details (4)
- 2.9.14+dfsg-1.3~deb12u6 · amd64 · bookworm
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u6 · arm64 · bookworm
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm
- 2.9.14+dfsg-1.3~deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2.9.4+dfsg1-3.1
  dsa · libxml2 · debian · bookworm

Observed: Oct 23, 2026, 5:31:44 PM UTC

References

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]