{"schema_version":"1.7.2","id":"OESA-2026-3039","modified":"2026-07-19T03:48:21Z","published":"2026-07-19T03:48:21Z","upstream":["CVE-2026-11979"],"summary":"libxml2 security update","details":"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.\r\n\r\nSecurity Fix(es):\n\nlibxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.\nBy supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.\nSuccessful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.\n\nThis issue has been fixed in the commit c2e233fc.\n\nNOTE:\nThe maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.(CVE-2026-11979)","affected":[{"package":{"ecosystem":"openEuler:22.03-LTS-SP4","name":"libxml2","purl":"pkg:rpm/openEuler/libxml2&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.14-29.oe2203sp4"}]}],"ecosystem_specific":{"aarch64":["libxml2-2.9.14-29.oe2203sp4.aarch64.rpm","libxml2-debuginfo-2.9.14-29.oe2203sp4.aarch64.rpm","libxml2-debugsource-2.9.14-29.oe2203sp4.aarch64.rpm","libxml2-devel-2.9.14-29.oe2203sp4.aarch64.rpm","python3-libxml2-2.9.14-29.oe2203sp4.aarch64.rpm"],"noarch":["libxml2-help-2.9.14-29.oe2203sp4.noarch.rpm"],"src":["libxml2-2.9.14-29.oe2203sp4.src.rpm"],"x86_64":["libxml2-2.9.14-29.oe2203sp4.x86_64.rpm","libxml2-debuginfo-2.9.14-29.oe2203sp4.x86_64.rpm","libxml2-debugsource-2.9.14-29.oe2203sp4.x86_64.rpm","libxml2-devel-2.9.14-29.oe2203sp4.x86_64.rpm","python3-libxml2-2.9.14-29.oe2203sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP1","name":"libxml2","purl":"pkg:rpm/openEuler/libxml2&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.11.9-14.oe2403sp1"}]}],"ecosystem_specific":{"aarch64":["libxml2-2.11.9-14.oe2403sp1.aarch64.rpm","libxml2-debuginfo-2.11.9-14.oe2403sp1.aarch64.rpm","libxml2-debugsource-2.11.9-14.oe2403sp1.aarch64.rpm","libxml2-devel-2.11.9-14.oe2403sp1.aarch64.rpm","python3-libxml2-2.11.9-14.oe2403sp1.aarch64.rpm"],"noarch":["libxml2-help-2.11.9-14.oe2403sp1.noarch.rpm"],"src":["libxml2-2.11.9-14.oe2403sp1.src.rpm"],"x86_64":["libxml2-2.11.9-14.oe2403sp1.x86_64.rpm","libxml2-debuginfo-2.11.9-14.oe2403sp1.x86_64.rpm","libxml2-debugsource-2.11.9-14.oe2403sp1.x86_64.rpm","libxml2-devel-2.11.9-14.oe2403sp1.x86_64.rpm","python3-libxml2-2.11.9-14.oe2403sp1.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"libxml2","purl":"pkg:rpm/openEuler/libxml2&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.11.9-14.oe2403sp3"}]}],"ecosystem_specific":{"aarch64":["libxml2-2.11.9-14.oe2403sp3.aarch64.rpm","libxml2-debuginfo-2.11.9-14.oe2403sp3.aarch64.rpm","libxml2-debugsource-2.11.9-14.oe2403sp3.aarch64.rpm","libxml2-devel-2.11.9-14.oe2403sp3.aarch64.rpm","python3-libxml2-2.11.9-14.oe2403sp3.aarch64.rpm"],"noarch":["libxml2-help-2.11.9-14.oe2403sp3.noarch.rpm"],"src":["libxml2-2.11.9-14.oe2403sp3.src.rpm"],"x86_64":["libxml2-2.11.9-14.oe2403sp3.x86_64.rpm","libxml2-debuginfo-2.11.9-14.oe2403sp3.x86_64.rpm","libxml2-debugsource-2.11.9-14.oe2403sp3.x86_64.rpm","libxml2-devel-2.11.9-14.oe2403sp3.x86_64.rpm","python3-libxml2-2.11.9-14.oe2403sp3.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP4","name":"libxml2","purl":"pkg:rpm/openEuler/libxml2&distro=openEuler-24.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.11.9-14.oe2403sp4"}]}],"ecosystem_specific":{"aarch64":["libxml2-2.11.9-14.oe2403sp4.aarch64.rpm","libxml2-debuginfo-2.11.9-14.oe2403sp4.aarch64.rpm","libxml2-debugsource-2.11.9-14.oe2403sp4.aarch64.rpm","libxml2-devel-2.11.9-14.oe2403sp4.aarch64.rpm","python3-libxml2-2.11.9-14.oe2403sp4.aarch64.rpm"],"noarch":["libxml2-help-2.11.9-14.oe2403sp4.noarch.rpm"],"src":["libxml2-2.11.9-14.oe2403sp4.src.rpm"],"x86_64":["libxml2-2.11.9-14.oe2403sp4.x86_64.rpm","libxml2-debuginfo-2.11.9-14.oe2403sp4.x86_64.rpm","libxml2-debugsource-2.11.9-14.oe2403sp4.x86_64.rpm","libxml2-devel-2.11.9-14.oe2403sp4.x86_64.rpm","python3-libxml2-2.11.9-14.oe2403sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:20.03-LTS-SP4","name":"libxml2","purl":"pkg:rpm/openEuler/libxml2&distro=openEuler-20.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.10-58.oe2003sp4"}]}],"ecosystem_specific":{"aarch64":["libxml2-2.9.10-58.oe2003sp4.aarch64.rpm","libxml2-debuginfo-2.9.10-58.oe2003sp4.aarch64.rpm","libxml2-debugsource-2.9.10-58.oe2003sp4.aarch64.rpm","libxml2-devel-2.9.10-58.oe2003sp4.aarch64.rpm","python2-libxml2-2.9.10-58.oe2003sp4.aarch64.rpm","python3-libxml2-2.9.10-58.oe2003sp4.aarch64.rpm"],"noarch":["libxml2-help-2.9.10-58.oe2003sp4.noarch.rpm"],"src":["libxml2-2.9.10-58.oe2003sp4.src.rpm"],"x86_64":["libxml2-2.9.10-58.oe2003sp4.x86_64.rpm","libxml2-debuginfo-2.9.10-58.oe2003sp4.x86_64.rpm","libxml2-debugsource-2.9.10-58.oe2003sp4.x86_64.rpm","libxml2-devel-2.9.10-58.oe2003sp4.x86_64.rpm","python2-libxml2-2.9.10-58.oe2003sp4.x86_64.rpm","python3-libxml2-2.9.10-58.oe2003sp4.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3039"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11979"}],"database_specific":{"severity":"High"}}