CVE catalog
CVE-2026-43864
mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.
- Severity
- Medium · CVSS 4.7
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.10% · Oct 25, 2026
mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | mutt | sid | 2.4.1-1.1 | fixed |
| Debian | mutt | forky | 2.4.1-1 | fixed |
| Debian | mutt | trixie | 2.2.13-1+deb13u1 | fixed |
| Debian | mutt | trixie-security | 2.2.13-1+deb13u2 | fixed |
| Debian | mutt | bookworm | 2.2.12-0.1~deb12u1 | vulnerable |
| Debian | mutt | bookworm-security | 2.2.9-1+deb12u1 | vulnerable |
| Cpe | mutt | Not reported | Not reported | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | mutt | source | sid | 2.3.2-1 | not yet assigned | Not reported | [1135699] |
| Debian | mutt | source | forky | 2.3.2-1 | not yet assigned | Not reported | [1135699] |
| Debian | mutt | source | trixie | 2.2.13-1+deb13u1 | not yet assigned | Not reported | [1135699] |
| Debian | mutt | source | bookworm | (unfixed) | not yet assigned | Not reported | [1135699] |
Notes
[bookworm] mutt: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [mutt]Affected
Details (4)
2.2.12-0.1~deb12u1· amd64 · bookwormAffected
nvd · mutt · debian · bookworm; nvd · mutt · debian · 12
2.2.12-0.1~deb12u1· arm64 · bookwormAffected
nvd · mutt · debian · bookworm; nvd · mutt · debian · 12
2.2.9-1+deb12u1· amd64 · bookworm-securityAffected
nvd · mutt · debian · bookworm; nvd · mutt · debian · 12
2.2.9-1+deb12u1· arm64 · bookworm-securityAffected
nvd · mutt · debian · bookworm; nvd · mutt · debian · 12
[Debian 13 (Trixie)]
- [mutt]Fixed
Details (3)
2.2.13-1+deb13u1· amd64 · trixieFixed · Fixed:
2.2.13-1+deb13u1nvd · mutt · debian · 13
2.2.13-1+deb13u1· arm64 · trixieFixed · Fixed:
2.2.13-1+deb13u1nvd · mutt · debian · 13
2.2.13-1+deb13u2· amd64 · trixie-securityFixed · Fixed:
2.2.13-1+deb13u1nvd · mutt · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_2300-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-43864]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-43864]
- [https://security-tracker.debian.org/tracker/CVE-2026-43864]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43864.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1343.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]