CVE-2026-74860
Fixed in a distro release EPSS <1%CVSS 8.5
A flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing a Document Type Definition (DTD) with enumerated attribute values. This triggers a double-free error in the SAX attributeDecl callback handler, where a string is freed twice. This flaw can lead to a denial of service (DoS) due to a reproducible crash in Python applications using the libxml2 SAX bindings.
Products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Cert Manager support for Red Hat OpenShift release 1.20, Red Hat Cost Management On-Premise 1, Red Hat Hardened Images, Red Hat Update Infrastructure 5, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat OpenShift Container Platform 4
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | libxml2 | 2.12.5-10.el10_2.4 |
| AlmaLinux 10 | libxml2-devel | 2.12.5-10.el10_2.4 |
| AlmaLinux 10 | libxml2-static | 2.12.5-10.el10_2.4 |
| AlmaLinux 10 | python3-libxml2 | 2.12.5-10.el10_2.4 |
| AlmaLinux 8 | libxml2 | 2.9.7-21.el8_10.9 |
| AlmaLinux 8 | libxml2-devel | 2.9.7-21.el8_10.9 |
| AlmaLinux 8 | python3-libxml2 | 2.9.7-21.el8_10.9 |
| AlmaLinux 9 | libxml2 | 2.9.13-14.el9_8.5 |
| AlmaLinux 9 | libxml2-devel | 2.9.13-14.el9_8.5 |
| AlmaLinux 9 | python3-libxml2 | 2.9.13-14.el9_8.5 |
| Debian 12 | libxml2 | no fix |
| Debian 13 | libxml2 | no fix |
| Debian 14 | libxml2 | 2.15.3+dfsg-1 |
| Red Hat Enterprise Linux 10.2 | libxml2 | 0:2.12.5-10.el10_2.4 |
| Red Hat Enterprise Linux 10.2 | libxml2-debuginfo | 0:2.12.5-10.el10_2.4 |
| Red Hat Enterprise Linux 10.2 | libxml2-debugsource | 0:2.12.5-10.el10_2.4 |
| Red Hat Enterprise Linux 10.2 | libxml2-devel | 0:2.12.5-10.el10_2.4 |
| Red Hat Enterprise Linux 10.2 | libxml2-static | 0:2.12.5-10.el10_2.4 |
| Red Hat Enterprise Linux 10.2 | python3-libxml2 | 0:2.12.5-10.el10_2.4 |
| Red Hat Enterprise Linux 10.2 | python3-libxml2-debuginfo | 0:2.12.5-10.el10_2.4 |
| Red Hat Enterprise Linux 8 | libxml2 | 0:2.9.7-21.el8_10.9 |
| Red Hat Enterprise Linux 8 | libxml2-debuginfo | 0:2.9.7-21.el8_10.9 |
| Red Hat Enterprise Linux 8 | libxml2-debugsource | 0:2.9.7-21.el8_10.9 |
| Red Hat Enterprise Linux 8 | libxml2-devel | 0:2.9.7-21.el8_10.9 |
| Red Hat Enterprise Linux 8 | python3-libxml2 | 0:2.9.7-21.el8_10.9 |
| Red Hat Enterprise Linux 8 | python3-libxml2-debuginfo | 0:2.9.7-21.el8_10.9 |
| Red Hat Enterprise Linux 9 | libxml2 | 0:2.9.13-14.el9_8.5 |
| Red Hat Enterprise Linux 9 | libxml2-debuginfo | 0:2.9.13-14.el9_8.5 |
| Red Hat Enterprise Linux 9 | libxml2-debugsource | 0:2.9.13-14.el9_8.5 |
| Red Hat Enterprise Linux 9 | libxml2-devel | 0:2.9.13-14.el9_8.5 |
| Red Hat Enterprise Linux 9 | python3-libxml2 | 0:2.9.13-14.el9_8.5 |
| Red Hat Enterprise Linux 9 | python3-libxml2-debuginfo | 0:2.9.13-14.el9_8.5 |
| Red Hat hummingbird 1 | libxml2 | 0:2.15.4-0.1.hum1 |
| Red Hat hummingbird 1 | libxml2-16 | 0:2.15.4-0.1.hum1 |
| Red Hat hummingbird 1 | libxml2-devel | 0:2.15.4-0.1.hum1 |
| Red Hat hummingbird 1 | libxml2-static | 0:2.15.4-0.1.hum1 |
| Red Hat hummingbird 1 | python3-libxml2 | 0:2.15.4-0.1.hum1 |
| Rocky Linux 10 | libxml2 | 0:2.12.5-10.el10_2.4 |
| Rocky Linux 8 | libxml2 | 0:2.9.7-21.el8_10.9 |
| Rocky Linux 9 | libxml2 | 0:2.9.13-14.el9_8.5 |
| Ubuntu 22.04 LTS | libxml2 | 2.9.13+dfsg-1ubuntu0.13 |
| Ubuntu 24.04 LTS | libxml2 | 2.9.14+dfsg-1.3ubuntu3.9 |
| Ubuntu 26.04 LTS | libxml2 | 2.15.2+dfsg-0.1ubuntu0.2 |
| Ubuntu Pro 14.04 LTS | libxml2 | 2.9.1+dfsg1-3ubuntu4.13+esm12 |
| Ubuntu Pro 16.04 LTS | libxml2 | 2.9.3+dfsg1-1ubuntu0.7+esm13 |
| Ubuntu Pro 18.04 LTS | libxml2 | 2.9.4+dfsg1-6.1ubuntu1.9+esm8 |
| Ubuntu Pro 20.04 LTS | libxml2 | 2.9.10+dfsg-5ubuntu0.20.04.10+esm5 |