CVE-2026-43864

A flaw was found in mutt. This vulnerability, a null pointer dereference in the show_sig_summary function, could allow an attacker to cause a denial of service. This occurs when processing specially crafted input related to signature summaries.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.