An issue was discovered in libxml2 before 2.11.7 and 2.12.x before 2.12.5. When using the XML Reader interface with DTD validation and XInclude expansion enabled, processing crafted XML documents can lead to an xmlValidatePopElement use-after-free.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libxml2 | Xmlsoft | * | 2.11.7 (excluding) |
| Libxml2 | Xmlsoft | 2.12.0 (including) | 2.12.5 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | libxml2-0:2.9.7-18.el8_10.1 | * |
| Red Hat Enterprise Linux 8 | RedHat | libxml2-0:2.9.7-18.el8_10.1 | * |
| Red Hat Enterprise Linux 8.6 Extended Update Support | RedHat | libxml2-0:2.9.7-13.el8_6.5 | * |
| Red Hat Enterprise Linux 8.8 Extended Update Support | RedHat | libxml2-0:2.9.7-16.el8_8.4 | * |
| Red Hat Enterprise Linux 9 | RedHat | libxml2-0:2.9.13-6.el9_4 | * |
| Red Hat Enterprise Linux 9 | RedHat | libxml2-0:2.9.13-6.el9_4 | * |
| Red Hat Enterprise Linux 9.2 Extended Update Support | RedHat | libxml2-0:2.9.13-3.el9_2.3 | * |
| Text-Only JBCS | RedHat | libxml2 | * |
| Libxml2 | Ubuntu | bionic | * |
| Libxml2 | Ubuntu | devel | * |
| Libxml2 | Ubuntu | esm-infra-legacy/trusty | * |
| Libxml2 | Ubuntu | esm-infra/bionic | * |
| Libxml2 | Ubuntu | esm-infra/focal | * |
| Libxml2 | Ubuntu | esm-infra/xenial | * |
| Libxml2 | Ubuntu | focal | * |
| Libxml2 | Ubuntu | jammy | * |
| Libxml2 | Ubuntu | mantic | * |
| Libxml2 | Ubuntu | trusty | * |
| Libxml2 | Ubuntu | trusty/esm | * |
| Libxml2 | Ubuntu | xenial | * |