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 identified in the interactive shell of the xmllint utility, part of the libxml2 project, where memory allocated for user input is not properly released under certain conditions. When a user submits input consisting only of whitespace, the program skips command execution but fails to free the allocated buffer. Repeating this action causes memory to continuously accumulate. Over time, this can exhaust system memory and terminate the xmllint process, creating a denial-of-service condition on the local system.

A flaw was identified in the interactive shell of the xmllint utility, part of the libxml2 project, where memory allocated for user input is not properly released under certain conditions. When a user submits input consisting only of whitespace, the program skips command execution but fails to free the allocated buffer. Repeating this action causes memory to continuously accumulate. Over time, this can exhaust system memory and terminate the xmllint process, creating a denial-of-service condition on the local system.

Affected: openEuler:24.03-LTS-SP3: libxml2, openEuler:20.03-LTS-SP4: libxml2, openEuler:22.03-LTS-SP4: libxml2, openEuler:24.03-LTS: libxml2, openEuler:24.03-LTS-SP1: libxml2, openEuler:24.03-LTS-SP2: 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 flaw was identified in the interactive shell of the xmllint utility, part of the libxml2 project, where memory allocated for user input is not properly released under certain conditions. When a user submits input consisting only of whitespace, the program skips command execution but fails to free the allocated buffer. Repeating this action causes memory to continuously accumulate. Over time, this can exhaust system memory and terminate the xmllint process, creating a denial-of-service condition on the local system.(CVE-2026-1757)

libxml2-16-2.14.5-3.1 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:25.10: libxml2

A flaw was identified in the interactive shell of the xmllint utility, part of the libxml2 project, where memory allocated for user input is not properly released under certain conditions. When a user submits input consisting only of whitespace, the program skips command execution but fails to free the allocated buffer. Repeating this action causes memory to continuously accumulate. Over time, this can exhaust system memory and terminate the xmllint process, creating a denial-of-service condition on the local system.

Ein lokaler Angreifer kann eine Schwachstelle in libxml2 ausnutzen, um einen Denial of Service Angriff durchzuführen.