Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2025-49796: libxml: Type confusion leads to Denial of service (DoS) CVE-2025-49795: libxml: Null pointer dereference leads to Denial of service (DoS) CVE-2025-49794: libxml: Heap use after free (UAF) leads to Denial of service (DoS)
Fixed packages 7
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | libxml2 | 0:2.10.4-1.amzn2023.0.12 |
| Amazon Linux · 2023 | libxml2-debuginfo | 0:2.10.4-1.amzn2023.0.12 |
| Amazon Linux · 2023 | libxml2-debugsource | 0:2.10.4-1.amzn2023.0.12 |
| Amazon Linux · 2023 | libxml2-devel | 0:2.10.4-1.amzn2023.0.12 |
| Amazon Linux · 2023 | libxml2-static | 0:2.10.4-1.amzn2023.0.12 |
| Amazon Linux · 2023 | python3-libxml2 | 0:2.10.4-1.amzn2023.0.12 |
| Amazon Linux · 2023 | python3-libxml2-debuginfo | 0:2.10.4-1.amzn2023.0.12 |
Vulnerabilities 3
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Critical 9.1
Libxml: heap use after free (uaf) leads to denial of service (dos)
A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the <sch:name path="..."/> schema elements. This flaw allows a malicious actor to craft a malicious XML …
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Critical 9.1
Libxml: type confusion leads to denial of service (dos)
A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of …
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High 7.5
Libxml: null pointer dereference leads to denial of service (dos)
A NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions. This flaw allows an attacker to craft a malicious XML input to libxml2, leading to a denial of service.