CVE-2026-88383

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.

CVSS 3.1

6.2CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 9% of CVEs (scores of 2026-10-25)

CWE

CWE-843

Published

2026-09-24

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

References

• https://github.com/libical/libical/issues/1361
• https://github.com/libical/libical/pull/1363
• https://github.com/libical/libical/pull/1363/changes/557d9c043733b33a8511dce41fdeeb508460d5a9
• https://github.com/libical/libical/issues/1361

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