SUSE-SU-2026:2300-1: moderate: Security update for mutt

Mon Jun 8 20:36:03 UTC 2026

# Security update for mutt

Announcement ID: SUSE-SU-2026:2300-1  
Release Date: 2026-06-08T13:54:59Z  
Rating: moderate  
References:

  * bsc#1263892
  * bsc#1263893
  * bsc#1263894
  * bsc#1263895
  * bsc#1263896
  * bsc#1263897
  * bsc#1264047

Cross-References:

  * CVE-2026-43859
  * CVE-2026-43860
  * CVE-2026-43861
  * CVE-2026-43862
  * CVE-2026-43863
  * CVE-2026-43864

CVSS scores:

  * CVE-2026-43859 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-43859 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-43859 ( NVD ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-43860 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-43860 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-43860 ( NVD ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-43861 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-43861 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-43861 ( NVD ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-43862 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-43862 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-43862 ( NVD ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-43863 ( SUSE ):  4.8
    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-43863 ( SUSE ):  3.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
  * CVE-2026-43863 ( NVD ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-43864 ( SUSE ):  2.0
    CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-43864 ( SUSE ):  2.5 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
  * CVE-2026-43864 ( NVD ):  2.5 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

Affected Products:

  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

An update that solves six vulnerabilities and has one security fix can now be
installed.

## Description:

This update for mutt fixes the following issues

  * CVE-2026-43859: `strfcpy` used instead of `memcpy` for the IMAP `auth_cram`
    MD5 digest (bsc#1263897).
  * CVE-2026-43860: truncation of `hash_passwd` by one byte for IMAP `auth_cram`
    MD5 digest (bsc#1263896).
  * CVE-2026-43861: missing check for `\0` in `url_pct_decode` (bsc#1263895).
  * CVE-2026-43862: mishandling of the `imap_auth_gss` security level
    (bsc#1263894).
  * CVE-2026-43863: infinite loop in `data_object_to_stream` in `crypt-gpgme.c`
    (bsc#1263893).
  * CVE-2026-43864: NULL pointer dereference in function `show_sig_summary`
    (bsc#1263892).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-2300=1

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * mutt-1.10.1-55.33.1
    * mutt-debuginfo-1.10.1-55.33.1
    * mutt-debugsource-1.10.1-55.33.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-43859.html
  * https://www.suse.com/security/cve/CVE-2026-43860.html
  * https://www.suse.com/security/cve/CVE-2026-43861.html
  * https://www.suse.com/security/cve/CVE-2026-43862.html
  * https://www.suse.com/security/cve/CVE-2026-43863.html
  * https://www.suse.com/security/cve/CVE-2026-43864.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1263892
  * https://bugzilla.suse.com/show_bug.cgi?id=1263893
  * https://bugzilla.suse.com/show_bug.cgi?id=1263894
  * https://bugzilla.suse.com/show_bug.cgi?id=1263895
  * https://bugzilla.suse.com/show_bug.cgi?id=1263896
  * https://bugzilla.suse.com/show_bug.cgi?id=1263897
  * https://bugzilla.suse.com/show_bug.cgi?id=1264047

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