Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-76781: 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).
Fixed packages 5
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | libxml2 | 0:2.9.1-6.amzn2.5.28 |
| Amazon Linux · 2 | libxml2-debuginfo | 0:2.9.1-6.amzn2.5.28 |
| Amazon Linux · 2 | libxml2-devel | 0:2.9.1-6.amzn2.5.28 |
| Amazon Linux · 2 | libxml2-python | 0:2.9.1-6.amzn2.5.28 |
| Amazon Linux · 2 | libxml2-static | 0:2.9.1-6.amzn2.5.28 |
Vulnerabilities 1
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Medium 5.5
Libxml2: libxml2: null pointer dereference parsing nextcatalog without catalog attribute
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 …
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2026-76781.html