Affected: Alpaquita:23: libxml2, Alpaquita:25: libxml2, Alpaquita:stream: libxml2, BellSoft Hardened Containers:23: libxml2, BellSoft Hardened Containers:25: libxml2, BellSoft Hardened Containers:stream: libxml2

A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application availability, resulting in a denial-of-service condition.

A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application availability, resulting in a denial-of-service condition.

Affected: openEuler:22.03-LTS-SP4: libxml2, openEuler:24.03-LTS: libxml2, openEuler:24.03-LTS-SP1: libxml2, openEuler:24.03-LTS-SP2: libxml2, openEuler:24.03-LTS-SP3: libxml2, openEuler:20.03-LTS-SP4: libxml2

This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. There is DTDs support this includes parsing and validation even with complex DtDs, either at parse time or later once the document has been modified. The output can be a simple SAX stream or and in-memory DOM like representations. In this case one can use the built-in XPath and XPointer implementation to select sub nodes or ranges. A flexible Input/Output mechanism is available, with existing HTTP and FTP modules and combined to an URI library. Security Fix(es):

A vulnerability was found in libxml2 up to 2.14.5. It has been declared as problematic. This vulnerability affects the function xmlParseSGMLCatalog of the component xmlcatalog. The manipulation leads to uncontrolled recursion. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains, that &quot;[t]he issue can only be triggered with untrusted SGML catalogs and it makes absolutely no sense to use untrusted catalogs. I also doubt that anyone is still using SGML catalogs at all.&quot;(CVE-2025-8732)

A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested &lt;include&gt; directives. Specially crafted or overly complex schemas can cause ex…

libxml2-16-2.14.5-4.1 on GA media

libxml2: Integer Overflow in xmlBuildQName() Leads to Stack Buffer Overflow in libxml2 libxml2: Stack Buffer Overflow in xmllint Interactive Shell Command Handling libxslt: libxml2: Inifinite recursion at exsltDynMapFunction function in libexslt/dynamic.c libxml2: Libxml2 out of bounds read libxml2: Out-of-Bounds Read in libxml2 libxml2: Out-of-bounds Read in xmlSchemaIDCFillNodeTables libxml: Heap use after free (UAF) leads to Denial of service (DoS) libxml: Null pointer dereference leads to Denial of service (DoS) libxml: Type confusion leads to Denial of service (DoS) libxml2: Unbounded RelaxNG Include Recursion Leading to Stack Overflow libxml2: libxml2: Denial of Service via uncontrolled recursion in XML catalog processing libxml2: libxml2: Denial of Service via crafted XML catalogs libxml2: Memory Leak Leading to Local Denial of Service in xmllint Interactive Shell

Security update for libxml2

Affected: Ubuntu:Pro:14.04:LTS: libxml2, Ubuntu:Pro:16.04:LTS: libxml2, Ubuntu:Pro:18.04:LTS: libxml2, Ubuntu:Pro:20.04:LTS: libxml2, Ubuntu:22.04:LTS: libxml2, Ubuntu:24.04:LTS: libxml2, Ubuntu:25.10: libxml2

A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application availability, resulting in a denial-of-service condition.

Ein Angreifer kann mehrere Schwachstellen in libxml2 ausnutzen, um einen Denial of Service Angriff durchzuführen.