SUSE-SU-2026:23597-1: important: Security update for c-ares

[SLE-SECURITY-UPDATES]

# Security update for c-ares

Announcement ID: SUSE-SU-2026:23597-1  
Release Date: 2026-09-01T15:51:21Z  
Rating: important  
References:

  * bsc#1270416
  * bsc#1276290
  * bsc#1276291

  
Cross-References:

  * CVE-2026-33630
  * CVE-2026-69184
  * CVE-2026-69186

  
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-2026-33630 ( NVD ):  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
  * CVE-2026-69186 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves three vulnerabilities can now be installed.

## Description:

This update for c-ares fixes the following issues:

Updat to c-ares 1.36.8.

  * CVE-2026-33630: remotely triggerable use-after-free/double-free in query-
    completion handling via `ares_getaddrinfo()` over TCP (bsc#1270416).
  * CVE-2026-69184: CPU exhaustion denial of service via unbounded DNS name
    compression pointer chains (bsc#1276290).
  * CVE-2026-69186: memory amplification denial of service via unvalidated DNS
    header record counts (bsc#1276291).

Changes for c-ares:

  * For details, see https://c-ares.org/changelog.html.

## 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 for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-1579

  * SUSE Linux Enterprise Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-1579

## Package List:

  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * c-ares-utils-1.34.8-160000.1.1
    * libcares2-debuginfo-1.34.8-160000.1.1
    * libcares2-1.34.8-160000.1.1
    * c-ares-utils-debuginfo-1.34.8-160000.1.1
    * c-ares-debugsource-1.34.8-160000.1.1
    * c-ares-devel-1.34.8-160000.1.1
  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * c-ares-utils-1.34.8-160000.1.1
    * libcares2-debuginfo-1.34.8-160000.1.1
    * libcares2-1.34.8-160000.1.1
    * c-ares-utils-debuginfo-1.34.8-160000.1.1
    * c-ares-debugsource-1.34.8-160000.1.1
    * c-ares-devel-1.34.8-160000.1.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-33630.html
  * https://www.suse.com/security/cve/CVE-2026-69184.html
  * https://www.suse.com/security/cve/CVE-2026-69186.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1270416
  * https://bugzilla.suse.com/show_bug.cgi?id=1276290
  * https://bugzilla.suse.com/show_bug.cgi?id=1276291

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.suse.com/pipermail/sle-security-updates/attachments/20260914/b66fb092/attachment-0001.htm>