Description
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.
Metrics
CVSS 3.1 8.5/10
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:HWeakness enumeration
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.20 | — |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.20 | — |
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.20 | — |
| Red Hat | Red Hat Cost Management On-Premise 1 | — |
| Red Hat | Red Hat Hardened Images | — |
| Red Hat | Red Hat OpenShift AI 3.0 | — |
| Red Hat | Red Hat OpenShift AI 3.0 | — |
| Red Hat | Red Hat OpenShift AI 3.0 | — |
| Red Hat | Red Hat OpenShift AI 3.0 | — |
| Red Hat | Red Hat OpenShift AI 3.0 | — |
| Red Hat | Red Hat OpenShift AI 3.0 | — |
| Red Hat | Red Hat OpenShift AI 3.0 | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — |
| Red Hat | Red Hat OpenShift AI 3.4 | — |
| Red Hat | Red Hat OpenShift AI 3.5 | — |
| Red Hat | Red Hat OpenShift AI 3.5 | — |
| Red Hat | Red Hat OpenShift AI 3.5 | — |
| Red Hat | Red Hat OpenShift AI 3.5 | — |
| Red Hat | Red Hat OpenShift AI 3.5 | — |
| Red Hat | Red Hat OpenShift AI 3.5 | — |
| Red Hat | Red Hat OpenShift AI 3.5 | — |
| Red Hat | Red Hat OpenShift AI 3.5 | — |
| Red Hat | Red Hat OpenShift AI 3.5 | — |
References
- https://access.redhat.com/errata/RHSA-2026:64463
- https://access.redhat.com/errata/RHSA-2026:71585
- https://access.redhat.com/errata/RHSA-2026:71586
- https://access.redhat.com/errata/RHSA-2026:71641
- https://access.redhat.com/errata/RHSA-2026:72470
- https://access.redhat.com/errata/RHSA-2026:72475
- https://access.redhat.com/errata/RHSA-2026:72476
- https://access.redhat.com/errata/RHSA-2026:79357
- https://access.redhat.com/errata/RHSA-2026:82939
- https://access.redhat.com/errata/RHSA-2026:89750
- https://access.redhat.com/errata/RHSA-2026:89759
- https://access.redhat.com/errata/RHSA-2026:90309
- https://access.redhat.com/errata/RHSA-2026:91202
- https://access.redhat.com/errata/RHSA-2026:91204
- https://access.redhat.com/errata/RHSA-2026:91206
- https://access.redhat.com/errata/RHSA-2026:91207
- https://access.redhat.com/errata/RHSA-2026:91217
- https://access.redhat.com/errata/RHSA-2026:91218
- https://access.redhat.com/errata/RHSA-2026:91219
- https://access.redhat.com/errata/RHSA-2026:91224
- https://access.redhat.com/errata/RHSA-2026:91232
- https://access.redhat.com/errata/RHSA-2026:91233
- https://access.redhat.com/errata/RHSA-2026:91234
- https://access.redhat.com/errata/RHSA-2026:91235
- https://access.redhat.com/errata/RHSA-2026:91236
- https://access.redhat.com/errata/RHSA-2026:91237
- https://access.redhat.com/errata/RHSA-2026:91238
- https://access.redhat.com/errata/RHSA-2026:91241
- https://access.redhat.com/errata/RHSA-2026:91242
- https://access.redhat.com/errata/RHSA-2026:91243
- https://access.redhat.com/errata/RHSA-2026:91244
- https://access.redhat.com/errata/RHSA-2026:91245
- https://access.redhat.com/errata/RHSA-2026:91246
- https://access.redhat.com/errata/RHSA-2026:91248
- https://access.redhat.com/errata/RHSA-2026:91249
- https://access.redhat.com/errata/RHSA-2026:92352
- https://access.redhat.com/errata/RHSA-2026:92589
- https://access.redhat.com/errata/RHSA-2026:93463
- https://access.redhat.com/errata/RHSA-2026:93473
- https://access.redhat.com/errata/RHSA-2026:93791
- https://access.redhat.com/errata/RHSA-2026:94459
- https://access.redhat.com/errata/RHSA-2026:94468
- https://access.redhat.com/errata/RHSA-2026:94474
- https://access.redhat.com/errata/RHSA-2026:94476
- https://access.redhat.com/errata/RHSA-2026:98468
- https://access.redhat.com/errata/RHSA-2026:98572
- https://access.redhat.com/security/cve/CVE-2026-74860
- https://bugzilla.redhat.com/show_bug.cgi?id=2529697
Timeline
- Published
- Sep 8, 2026
- Last modified
- Nov 11, 2026
- NVD status
- Awaiting Analysis