SUSE-SU-2026:3491-1: moderate: Security update for libgcrypt

# Security update for libgcrypt

Announcement ID: SUSE-SU-2026:3491-1  
Release Date: 2026-08-04T11:58:46Z  
Rating: moderate  
References:

  * bsc#1262684

  
Cross-References:

  * CVE-2026-41989

  
CVSS scores:

  * CVE-2026-41989 ( SUSE ):  5.8
    CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-41989 ( SUSE ):  6.3 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
  * CVE-2026-41989 ( NVD ):  6.7 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

  
Affected Products:

  * openSUSE Leap 15.5
  * SUSE Linux Enterprise Micro 5.5

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for libgcrypt fixes the following issue

  * CVE-2026-41989: heap-based buffer overflow when processing crafted ECDH
    ciphertext can lead to a denial of service (bsc#1262684).

## 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 Micro 5.5  
    zypper in -t patch SUSE-SLE-Micro-5.5-2026-3491=1

  * openSUSE Leap 15.5  
    zypper in -t patch SUSE-2026-3491=1

## Package List:

  * openSUSE Leap 15.5 (aarch64 i586 ppc64le s390x x86_64)
    * libgcrypt-debugsource-1.9.4-150500.12.6.1
    * libgcrypt20-1.9.4-150500.12.6.1
    * libgcrypt-cavs-1.9.4-150500.12.6.1
    * libgcrypt-devel-1.9.4-150500.12.6.1
    * libgcrypt20-debuginfo-1.9.4-150500.12.6.1
    * libgcrypt-devel-debuginfo-1.9.4-150500.12.6.1
    * libgcrypt-cavs-debuginfo-1.9.4-150500.12.6.1
    * libgcrypt20-hmac-1.9.4-150500.12.6.1
  * openSUSE Leap 15.5 (x86_64)
    * libgcrypt20-32bit-debuginfo-1.9.4-150500.12.6.1
    * libgcrypt20-32bit-1.9.4-150500.12.6.1
    * libgcrypt-devel-32bit-1.9.4-150500.12.6.1
    * libgcrypt20-hmac-32bit-1.9.4-150500.12.6.1
    * libgcrypt-devel-32bit-debuginfo-1.9.4-150500.12.6.1
  * openSUSE Leap 15.5 (aarch64_ilp32)
    * libgcrypt20-hmac-64bit-1.9.4-150500.12.6.1
    * libgcrypt20-64bit-debuginfo-1.9.4-150500.12.6.1
    * libgcrypt-devel-64bit-1.9.4-150500.12.6.1
    * libgcrypt20-64bit-1.9.4-150500.12.6.1
    * libgcrypt-devel-64bit-debuginfo-1.9.4-150500.12.6.1
  * SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
    * libgcrypt-debugsource-1.9.4-150500.12.6.1
    * libgcrypt20-debuginfo-1.9.4-150500.12.6.1
    * libgcrypt20-1.9.4-150500.12.6.1
    * libgcrypt20-hmac-1.9.4-150500.12.6.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-41989.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1262684