Advisoriesby IbisRed HatCVE-2026-76781
Red Hat libxml2: null pointer dereference
No fix yet
A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a nextCatalog element lacks its mandatory catalog attribute, leading to the application crashing and causing a Denial of Service (DoS).
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat Enterprise Linux 6 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
| Red Hat Enterprise Linux 8 Product | all versions | No fix yet |
| all versions | No fix yet | |
| all versions | No fix yet | |
| Red Hat Enterprise Linux 9 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat Hardened Images Product | all versions | No fix yet |
| Red Hat OpenShift Container Platform 4 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-476
- www.cve.org/CVERecord?id=CVE-2026-76781
- nvd.nist.gov/vuln/detail/CVE-2026-76781
- access.redhat.com/errata/RHSA-2026:57604
- access.redhat.com/security/cve/CVE-2026-76781
- bugzilla.redhat.com/show_bug.cgi?id=2519776
- gitlab.gnome.org/GNOME/libxml2/-/commit/c6324894
- gitlab.gnome.org/GNOME/libxml2/-/merge_requests/442