{"id":"CLSA-2026-1789380986","summary":"libxml2: Fix of 3 CVEs","details":"- CVE-2026-86138: add overflow checks to xmlDictAddQString pool size\n  calculation and bound the QName lengths in its caller xmlDictQLookup to\n  prevent heap buffer overflow when interning long QNames\n- CVE-2026-86140: add bounds checks around the englobing parenthesis\n  strcat() calls in xmlSnprintfElements to prevent stack buffer overflow\n- CVE-2026-86142: reject XPointer parts whose length is not representable\n  as an int in xmlXPtrEvalXPtrPart to prevent heap buffer overflow","modified":"2026-10-26T09:31:40.238235132Z","published":"2026-09-15T14:41:33Z","upstream":["CVE-2026-86138","CVE-2026-86140","CVE-2026-86142"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/centos6els/CLSA-2026-1789380986.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86138"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86140"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86142"}],"affected":[{"package":{"name":"libxml2","ecosystem":"TuxCare:CentOS:6","purl":"pkg:rpm/tuxcare/libxml2?distro=centos-6"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.6-21.el6_8.1.tuxcare.els16"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2026-1789380986.json"}},{"package":{"name":"libxml2-devel","ecosystem":"TuxCare:CentOS:6","purl":"pkg:rpm/tuxcare/libxml2-devel?distro=centos-6"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.6-21.el6_8.1.tuxcare.els16"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2026-1789380986.json"}},{"package":{"name":"libxml2-python","ecosystem":"TuxCare:CentOS:6","purl":"pkg:rpm/tuxcare/libxml2-python?distro=centos-6"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.6-21.el6_8.1.tuxcare.els16"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2026-1789380986.json"}},{"package":{"name":"libxml2-static","ecosystem":"TuxCare:CentOS:6","purl":"pkg:rpm/tuxcare/libxml2-static?distro=centos-6"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.6-21.el6_8.1.tuxcare.els16"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos6els/CLSA-2026-1789380986.json"}}],"schema_version":"1.9.0"}