Bug 2464862 (CVE-2026-43864)

Summary: CVE-2026-43864 mutt: Mutt: Denial of Service via null pointer dereference in show_sig_summary
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
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.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-04 07:01:44 UTC
mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.