{"id":"CLSA-2026-1790248267","summary":"Fix CVE(s): CVE-2026-66046, CVE-2026-93990","details":"   * SECURITY UPDATE: quadratic runtime in the default-attribute lookup of\n     storeAtts(), and an out-of-bounds read in the same lookup for parsers\n     created by XML_ExternalEntityParserCreate()\n     - debian/patches/CVE-2026-66046.patch: in lib/xmlparse.c, replace the\n       linear scan over ELEMENT_TYPE.defaultAtts in storeAtts() with a lookup\n       in the already-present defaultAttForName hash table, and make dtdCopy()\n       create NAME_AND_DEFAULT_ATTRIBUTE-sized entries so storeAtts() no\n       longer reads member .attIndex past the end of an entry.\n     - CVE-2026-66046\n   * SECURITY UPDATE: a UTF-16 high surrogate not followed by a low surrogate\n     was accepted, letting the high surrogate swallow the following code unit\n     and hide it from the tokenizer\n     - debian/patches/CVE-2026-93990.patch: in lib/xmltok.c, add\n       LITTLE2_IS_INVALID_CHAR() / BIG2_IS_INVALID_CHAR() and wire them into\n       IS_INVALID_CHAR() for the little2_/big2_ tokenizers, so\n       INVALID_LEAD_CASE() in lib/xmltok_impl.c rejects a 4-byte UTF-16\n       character whose second code unit is not U+DC00..U+DFFF; drop the now\n       unreachable IS_INVALID_CHAR() no-op fallback in lib/xmltok_impl.c.\n     - CVE-2026-93990","modified":"2026-10-26T09:32:02.167836224Z","published":"2026-09-24T11:11:19Z","upstream":["CVE-2026-66046","CVE-2026-93990"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/ubuntu16.04els/CLSA-2026-1790248267.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66046"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93990"}],"affected":[{"package":{"name":"expat","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/expat?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-7ubuntu0.16.04.5+tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1790248267.json"}},{"package":{"name":"libexpat1","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/libexpat1?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-7ubuntu0.16.04.5+tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1790248267.json"}},{"package":{"name":"libexpat1-dev","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/libexpat1-dev?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-7ubuntu0.16.04.5+tuxcare.els14"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1790248267.json"}}],"schema_version":"1.9.0"}