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.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-d4c8dad1fd advisory.

    Add a patch for CVE-2026-88383: Denial of Service via crafted iCalendar property parsing

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-a76bba1412 advisory.

    Add a patch for CVE-2026-88383: Denial of Service via crafted iCalendar property parsing

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-88383)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
364653	Fedora 43 : libical (2026-d4c8dad1fd)	Nessus	Fedora Local Security Checks	Local	medium
363796	Fedora 44 : libical (2026-a76bba1412)	Nessus	Fedora Local Security Checks	Local	medium
349811	Linux Distros Unpatched Vulnerability : CVE-2026-88383	Nessus	Misc.	Local	medium

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CVE-2026-88383

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