{"id":"UBUNTU-CVE-2026-111269","details":"libical through 4.0.6 contains a heap-based out-of-bounds read in icalvalue_decode_ical_string() in src/libical/icalvalue.c when decoding input ending in a backslash. Attackers can supply escaped iCalendar text with a trailing backslash, causing the loop to read past the terminator and crash the application or leak adjacent heap memory.","modified":"2026-10-17T12:58:03.956808298Z","published":"2026-10-16T00:00:00Z","upstream":["CVE-2026-111269"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-111269"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-111269"},{"type":"REPORT","url":"https://github.com/libical/libical"},{"type":"REPORT","url":"https://github.com/libical/libical/blob/9cfca65c122fa23b9680a28e0c9225a2fd015fc5/src/libical/icalvalue.c#L1608-L1645"},{"type":"REPORT","url":"https://github.com/libical/libical/commit/d753885ce2de7c105d6b8c405aa7aee1d98ad8de"},{"type":"REPORT","url":"https://github.com/libical/libical/pull/1455"},{"type":"REPORT","url":"https://hackmd.io/@haind-pwn/libical-icalvalue-decode-ical-string-oob-read"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/libical-through-4.0.6-heap-out-of-bounds-read-via-icalvalue-decode-ical-string"}],"affected":[{"package":{"name":"libical","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libical?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.1-0ubuntu1","1.0.1-0ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libical1a","binary_version":"1.0.1-0ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111269.json"}},{"package":{"name":"libical","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libical?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0-0.5","2.0.0-0.5build1","2.0.0-1ubuntu1","2.0.0-4"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.0-4","binary_name":"libical2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111269.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}