CVE-2026-76781
CVE-2026-76781: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium5.5
Medium [CVE-2026-76781] Libxml2: libxml2: null pointer dereference parsing nextcatalog without catalog attribute
CVE-2026-76781Source published Source updated
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). This Moderate flaw in libxml2's XML catalog parsing can lead to a denial of service. The vulnerability requires user interaction, as a specially crafted XML catalog with a missing `catalog` attribute in a `nextCatalog` element must be processed by an application using libxml2, causing it to crash. This limits the attack surface to scenarios where an attacker can provide malicious XML input to a vulnerable application. Red Hat severity: Moderate — CVSS 5.5…
- Affected products in this advisory
- Red Hat Hardened Images
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
5 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- libxml2-main-2.15.3-0.1.3.hum1
- RHSA-2026:57604
- Mitigation guidance
- To mitigate this issue, avoid processing untrusted XML catalog files with applications linked against libxml2. Users should exercise caution when opening or processing XML documents from untrusted sources, as a malicious catalog could lead to application crashes. Where possible, restrict the ability of applications to load external XML catalogs, or ensure that only trusted catalog files are used.
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