Description
libxml2 through 2.11.5 has a use-after-free that can only occur after a certain memory allocation fails. This occurs in xmlUnlinkNode in tree.c. NOTE: the vendor's position is "I don't think these issues are critical enough to warrant a CVE ID ... because an attacker typically can't control when memory allocations fail."
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 | 2.12.7+dfsg+really2.9.14-1 | — |
| Debian 13 | libxml2 | 2.12.7+dfsg+really2.9.14-1 | — |
| Debian 12 | libxml2 | 2.9.14+dfsg-1.3~deb12u2 | DSA-5949-1 |
| Debian 11 | libxml2 | 2.9.10+dfsg-6.7+deb11u6 | DLA-4064-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | libxml2 +1 | 2.10.3-150500.5.11.1 | SUSE-SU-2023:4504-1 |
| SLES 15 SP4 | libxml2 +1 | 2.9.14-150400.5.25.1 | SUSE-SU-2023:4537-1 |
| SLES 12 SP5 | libxml2 +1 | 2.9.4-46.68.2 | SUSE-SU-2023:4505-1 |
| SLES 3 | libxml2-python | 2.9.14-150400.5.25.1 | SUSE-SU-2023:4537-1, SUSE-SU-2023:4504-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | libxml2 +1 | 2.9.4-46.68.2 | SUSE-SU-2023:4505-1 |
| SLE Micro 5.5 | libxml2 +1 | 2.10.3-150500.5.11.1 | SUSE-SU-2023:4504-1 |
| SLE Micro 5.4 | libxml2 +1 | 2.9.14-150400.5.25.1 | SUSE-SU-2023:4537-1 |
| SLE Micro 5.3 | libxml2 +1 | 2.9.14-150400.5.25.1 | SUSE-SU-2023:4537-1 |
| SLE Micro 5.2 | libxml2 +1 | 2.9.7-150000.3.63.1 | SUSE-SU-2023:4464-1 |
| SLE Micro 5.1 | libxml2 | 2.9.7-150000.3.63.1 | SUSE-SU-2023:4464-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libxml2 | 2.11.5-2.1 | openSUSE-SU-2024:13426-1 |
| openSUSE Leap 15.5 | libxml2 +1 | 2.10.3-150500.5.11.1 | SUSE-SU-2023:4504-1 |
| openSUSE Leap 15.5 | python-libxml2-python | 2.9.7-150000.3.63.1 | SUSE-SU-2023:4464-1 |
| openSUSE Leap 15.4 | libxml2 +1 | 2.9.14-150400.5.25.1 | SUSE-SU-2023:4537-1 |
| openSUSE Leap 15.4 | python-libxml2-python | 2.9.7-150000.3.63.1 | SUSE-SU-2023:4464-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | libxml2 +1 | 2.9.14-150400.5.25.1 | SUSE-SU-2023:4537-1 |
| openSUSE Leap Micro 5.3 | libxml2 +1 | 2.9.14-150400.5.25.1 | SUSE-SU-2023:4537-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | libxml2 +3 | 2.10.4-1.amzn2023.0.6 | ALAS2023-2023-411 |
| Amazon Linux 2 | libxml2 +3 | 2.9.1-6.amzn2.5.13 | ALAS2-2023-2321 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libxml2 | 2.11.5-3 | — |
| Azure Linux 2 (CBL-Mariner) | libxml2 | 2.10.4-2 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | libxml2 | 2.11.5-r1 | — |
Advisories 14
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- DSA-5949-1 libxml2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4064-1 libxml2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2023:4537-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4505-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4464-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4504-1 Security update for libxml2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13426-1 libxml2-2-2.11.5-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-3377 Dell PowerProtect Data Domain: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 12, 2025
- WID-SEC-2023-2588 libxml2: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Sep 21, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- WID-SEC-2024-0216 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 18, 2025
- ALAS2023-2023-411 Important: libxml2 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 3, 2023
- ALAS2-2023-2321 Important: libxml2 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 1, 2023