{"id":"CVE-2026-88383","aliases":["AZL-106797","DEBIAN-CVE-2026-88383","EUVD-2026-86316","GHSA-r8r2-rvrx-7xqq","MGASA-2026-0553","OESA-2026-4376","OESA-2026-4377","OESA-2026-4378","OESA-2026-4379","UBUNTU-CVE-2026-88383"],"status":"published","title":"libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When...","description":"libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.","severity":{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.00202,"percentile":0.10198,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-843"],"published":"2026-09-24T00:00:00Z","modified":"2026-11-07T14:16:48Z","fixes":[{"ecosystem":"Azure Linux:3","package":"libical","fixed_in":["3.0.10-3"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP4","package":"libical","fixed_in":["3.0.11-3.oe2203sp4"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"libical","fixed_in":["3.0.17-3.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP3","package":"libical","fixed_in":["3.0.17-3.oe2403sp3"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP4","package":"libical","fixed_in":["3.0.17-3.oe2403sp4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"libical","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.10-3"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"libical3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.16-1","3.0.17-1","3.0.17-1.1","3.0.17-1.1~exp1","3.0.18-1","3.0.19-1","3.0.19-2","3.0.19-3","3.0.19-4","3.0.20-1","3.0.20-2","3.0.20-3"]},{"source":"osv","ecosystem":"Debian:13","package":"libical3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.20-1","3.0.20-2","3.0.20-3"]},{"source":"osv","ecosystem":"Debian:14","package":"libical3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.20-1","3.0.20-2","3.0.20-3"]},{"source":"osv","ecosystem":"Mageia:10","package":"libical","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.20-2.1.mga10"}]}],"bundled":2},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP4","package":"libical","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.11-3.oe2203sp4"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"libical","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.17-3.oe2403sp1"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"libical","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.17-3.oe2403sp3"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP4","package":"libical","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.17-3.oe2403sp4"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"libical","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.1-0ubuntu1","1.0.1-0ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"libical","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"]}],"references":[{"url":"https://github.com/libical/libical/issues/1361","tags":["exploit","report"]},{"url":"https://github.com/libical/libical/pull/1363"},{"url":"https://github.com/libical/libical/pull/1363/changes/557d9c043733b33a8511dce41fdeeb508460d5a9"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88383","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-r8r2-rvrx-7xqq"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-88383","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0553.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=36475","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IS2XULHAXRU4HV4TBL2ALZSHAFHMXM5Y/","tags":["web"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540947","tags":["report"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4376","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4377","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4378","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4379","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-88383","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88383","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-88383","description":"libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.","status":"published","published":"2026-09-24T00:00:00Z","modified":"2026-10-06T17:42:25.354Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T13:41:53.237769Z"}],"euvd":[{"id":"EUVD-2026-86316","description":"libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.","status":"published","published":"2026-09-24T00:00:00Z","modified":"2026-10-06T17:42:25Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T17:27:37.140631Z"}],"ghsa":[{"id":"GHSA-r8r2-rvrx-7xqq","title":"libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When...","description":"libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.","status":"published","published":"2026-09-24T18:31:27Z","modified":"2026-10-06T18:32:25Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T15:12:51.459076Z"}],"nvd":[{"id":"CVE-2026-88383","description":"libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.","status":"published","published":"2026-09-24T17:17:07.787Z","modified":"2026-10-06T18:16:57.693Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:12:51.036099Z"}],"osv":[{"id":"DEBIAN-CVE-2026-88383","description":"libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.","status":"published","published":"2026-09-24T17:17:07.787Z","modified":"2026-10-07T10:00:13.08735986Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:46:05.506112Z"},{"id":"OESA-2026-4376","title":"libical security update","description":"Libical is an open source implementation of the IETF\u0026amp;apos;s iCalendar calendaring and scheduling protocols (RFC 2445, 2446, and 2447). It parses iCal components and provides a C API for manipulating the component properties, parameters, and subcomponents.\r\n\r\nSecurity Fix(es):\n\nlibical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.(CVE-2026-88383)","status":"published","published":"2026-10-16T11:59:56Z","modified":"2026-10-16T12:15:13.602840179Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4377","title":"libical security update","description":"Libical is an open source implementation of the IETF\u0026amp;apos;s iCalendar calendaring and scheduling protocols (RFC 2445, 2446, and 2447). It parses iCal components and provides a C API for manipulating the component properties, parameters, and subcomponents.\r\n\r\nSecurity Fix(es):\n\nlibical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.(CVE-2026-88383)","status":"published","published":"2026-10-16T11:59:57Z","modified":"2026-10-16T12:15:19.066977021Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4378","title":"libical security update","description":"Libical is an open source implementation of the IETF\u0026amp;apos;s iCalendar calendaring and scheduling protocols (RFC 2445, 2446, and 2447). It parses iCal components and provides a C API for manipulating the component properties, parameters, and subcomponents.\r\n\r\nSecurity Fix(es):\n\nlibical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.(CVE-2026-88383)","status":"published","published":"2026-10-16T11:59:57Z","modified":"2026-10-16T12:15:12.706006857Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4379","title":"libical security update","description":"Libical is an open source implementation of the IETF\u0026amp;apos;s iCalendar calendaring and scheduling protocols (RFC 2445, 2446, and 2447). It parses iCal components and provides a C API for manipulating the component properties, parameters, and subcomponents.\r\n\r\nSecurity Fix(es):\n\nlibical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.(CVE-2026-88383)","status":"published","published":"2026-10-16T11:59:58Z","modified":"2026-10-16T12:15:13.592151416Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"UBUNTU-CVE-2026-88383","description":"libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.","status":"published","published":"2026-09-24T17:17:00Z","modified":"2026-10-08T12:54:51.41884679Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:57:24.828975Z"},{"id":"AZL-106797","title":"CVE-2026-88383 affecting package libical for versions less than 3.0.10-3","description":"libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind(). When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.","status":"published","published":"2026-09-24T17:17:07Z","modified":"2026-11-07T14:16:48.951163972Z","updated_at":"2026-11-07T14:48:11.583685Z"},{"id":"MGASA-2026-0553","title":"Updated libical package fixes security vulnerabilities","description":"Denial of Service via crafted iCalendar property parsing.\n(CVE-2026-88383)\nHeap Out-of-Bounds Read via icalvalue_decode_ical_string.\n(CVE-2026-111269)\n","status":"published","published":"2026-10-27T04:31:25Z","modified":"2026-10-27T04:58:07.444835089Z","updated_at":"2026-11-02T15:49:43.795591Z"}]}}