SUSE-SU-2026:3872-1: important: Security update for libcares2

[SLE-SECURITY-UPDATES]

# Security update for libcares2

Announcement ID: SUSE-SU-2026:3872-1  
Release Date: 2026-08-28T17:57:16Z  
Rating: important  
References:

  * bsc#1270416
  * bsc#1276290

  
Cross-References:

  * CVE-2026-33630
  * CVE-2026-69184

  
CVSS scores:

  * CVE-2026-33630 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-33630 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-69184 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

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

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for libcares2 fixes the following issues:

  * CVE-2026-33630: Use-after-free / double-free in c-ares query-completion
    handling, remotely triggerable via ares_getaddrinfo() over TCP
    (bsc#1270416).
  * CVE-2026-69184: CPU-exhaustion denial of service via unbounded DNS name
    compression pointer chains (bsc#1276290).

## 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  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-3872=1

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-3872=1

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * libcares2-debugsource-1.9.1-9.24.1
    * libcares-devel-1.9.1-9.24.1
    * libcares2-1.9.1-9.24.1
    * libcares2-debuginfo-1.9.1-9.24.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * libcares2-debuginfo-1.9.1-9.24.1
    * libcares-devel-1.9.1-9.24.1
    * libcares2-debugsource-1.9.1-9.24.1
    * libcares2-1.9.1-9.24.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-33630.html
  * https://www.suse.com/security/cve/CVE-2026-69184.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1270416
  * https://bugzilla.suse.com/show_bug.cgi?id=1276290

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