Description
A flaw was found in the exsltFuncResultComp() function of libxslt, which handles EXSLT <func:result> elements during stylesheet parsing. Due to improper type handling, the function may treat an XML document node as a regular XML element node, resulting in a type confusion. This can cause unexpected memory reads and potential crashes. While difficult to exploit, the flaw could lead to application instability or denial of service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | libxslt | < 1.1.44 | 1.1.44 |
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
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 | libxslt | 1.1.43-0.3 | — |
| Debian 13 | libxslt | No fix yet | — |
| Debian 12 | libxslt | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libxslt | 1.1.43-0.3 | — |
| Ubuntu 25.10 | libxslt | No fix yet | — |
| Ubuntu 24.04 LTS | libxslt | No fix yet | — |
| Ubuntu 22.04 LTS | libxslt | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | libxslt | No fix yet | — |
| Ubuntu Pro 18.04 LTS | libxslt | No fix yet | — |
| Ubuntu Pro 16.04 LTS | libxslt | No fix yet | — |
| Ubuntu Pro 14.04 LTS | libxslt | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | libxslt +2 | 1.1.45-0.1.hum1 | RHSA-2026:11015 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2025:3875-1 |
| SLES 15 SP6 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2025:3875-1 |
| SLES 15 SP5 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2026:0603-1 |
| SLES 15 SP4 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2026:0603-1 |
| SLES 15 SP3 | libxslt | 1.1.32-150000.3.28.1 | SUSE-SU-2025:3743-1 |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | libxslt | 1.1.28-17.21.1 | SUSE-SU-2025:3778-1 |
| SLES for SAP 16.0 | libxslt | 1.1.43-160000.3.1 | SUSE-SU-2025:21008-1 |
| SLES for SAP 15 SP5 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2026:0603-1 |
| SLES for SAP 15 SP4 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2026:0603-1 |
| SLES for SAP 15 SP3 | libxslt | 1.1.32-150000.3.28.1 | SUSE-SU-2025:3743-1 |
| SLES 16.0 | libxslt | 1.1.43-160000.3.1 | SUSE-SU-2025:21008-1 |
| SLE Micro 6.2 | libxslt | 1.1.43-160000.3.1 | SUSE-SU-2025:21031-1 |
| SLE Micro 6.1 | libxslt | 1.1.38-slfo.1.1_5.1 | SUSE-SU-2025:20897-1 |
| SLE Micro 6.0 | libxslt | 1.1.38-7.1 | SUSE-SU-2025:20892-1 |
| SLE Micro 5.5 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2025:3875-1 |
| SLE Micro 5.4 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2025:3875-1 |
| SLE Micro 5.3 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2025:3875-1 |
| SLE Micro 5.2 | libxslt | 1.1.32-150000.3.28.1 | SUSE-SU-2025:3743-1 |
| SLE Micro 5.1 | libxslt | 1.1.32-150000.3.28.1 | SUSE-SU-2025:3743-1 |
| SLE HPC 15 SP5 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2026:0603-1 |
| SLE HPC 15 SP4 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2026:0603-1 |
| SLE HPC 15 SP3 | libxslt | 1.1.32-150000.3.28.1 | SUSE-SU-2025:3743-1 |
| SUSE Enterprise Storage 7.1 | libxslt | 1.1.32-150000.3.28.1 | SUSE-SU-2025:3743-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libxslt | 1.1.43-4.1 | openSUSE-SU-2025:15641-1 |
| openSUSE Tumbleweed | python-lxml | 6.1.1-1.1 | openSUSE-SU-2026:11147-1 |
| openSUSE Leap 16.0 | libxslt | 1.1.43-160000.3.1 | openSUSE-SU-2025:20050-1 |
| openSUSE Leap 15.6 | libxslt | 1.1.34-150400.3.13.1 | SUSE-SU-2025:3875-1 |
| openSUSE Leap 15.6 | libxslt-python | 1.1.32-150000.3.28.1 | SUSE-SU-2025:3743-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libxslt | 1.1.43-3 | — |
| Azure Linux 2 (CBL-Mariner) | libxslt | 1.1.34-9 | — |
Advisories 15
- WID-SEC-2026-1287 Red Hat Hardened Images RPMs (libxslt): Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Nov 10, 2026
- RHSA-2026:11015 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- WID-SEC-2026-0349 Dell Avamar und NetWorker: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- openSUSE-SU-2026:11147-1 python-lxml-doc-6.1.1-1.1 on GA media SUSE / openSUSE Security Updates · Jun 30, 2026
- WID-SEC-2026-0778 Dell Secure Connect Gateway Policy Manager: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 11, 2026
- openSUSE-SU-2025:20050-1 Security update for libxslt SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15641-1 libexslt0-1.1.43-4.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0603-1 Security update for libxslt SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:3875-1 Security update for libxslt SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21008-1 Security update for libxslt SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21031-1 Security update for libxslt SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20897-1 Security update for libxslt SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20892-1 Security update for libxslt SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:3743-1 Security update for libxslt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:3778-1 Security update for libxslt SUSE / openSUSE Security Updates · Feb 4, 2026