Description
The htmlParseTryOrFinish function in HTMLparser.c in libxml2 2.9.4 allows attackers to cause a denial of service (buffer over-read) or information disclosure.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libxml2 | 2.9.4+dfsg1-6.1 | — |
| Debian 13 | libxml2 | 2.9.4+dfsg1-6.1 | — |
| Debian 12 | libxml2 | 2.9.4+dfsg1-6.1 | — |
| Debian 9 | libxml2 | 2.9.4+dfsg1-2.2+deb9u3 | DLA-2369-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libxml2 | 2.9.10+dfsg-5ubuntu0.20.04.1 | USN-4991-1 |
| Ubuntu 18.04 LTS | libxml2 | 2.9.4+dfsg1-6.1ubuntu1 | USN-4991-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | libxml2 | 2.9.3+dfsg1-1ubuntu0.7+esm1 | USN-4991-1 |
| Ubuntu Pro 14.04 LTS | libxml2 | 2.9.1+dfsg1-3ubuntu4.13+esm2 | USN-4991-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | libxml2 +1 | 2.9.4-46.3.2 | SUSE-SU-2017:2141-1 |
| SLES 12 SP2 | libxml2 +1 | 2.9.4-46.3.2 | SUSE-SU-2017:2141-1 |
| SLES 11 SP4 | libxml2 | 2.7.6-0.77.3.2 | SUSE-SU-2017:2115-1 |
| SLES 11 SP4 | libxml2-python | 2.7.6-0.77.3.5 | SUSE-SU-2017:2115-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | libxml2 +1 | 2.9.4-46.3.2 | SUSE-SU-2017:2141-1 |
| SLES for SAP 12 SP2 | libxml2 +1 | 2.9.4-46.3.2 | SUSE-SU-2017:2141-1 |
| SLES for SAP 11 SP4 | libxml2 | 2.7.6-0.77.3.2 | SUSE-SU-2017:2115-1 |
| SLES for SAP 11 SP4 | libxml2-python | 2.7.6-0.77.3.5 | SUSE-SU-2017:2115-1 |
Advisories 6
- USN-4991-1 libxml2 vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- DLA-2369-1 libxml2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:2115-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2141-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-1614 Tenable Security Nessus Network Monitor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2023
- ICSA-21-336-06 Hitachi Energy APM Edge CISA ICS & IT advisories · Dec 2, 2021