SUSE-SU-2026:1618-1: moderate: Security update for dnsdist

Fri Apr 24 20:31:30 UTC 2026

# Security update for dnsdist

Announcement ID: SUSE-SU-2026:1618-1  
Release Date: 2026-04-24T14:25:54Z  
Rating: moderate  
References:

  * bsc#1261236
  * bsc#1261237
  * bsc#1261238
  * bsc#1261239
  * bsc#1261240
  * bsc#1261241
  * bsc#1261243

Cross-References:

  * CVE-2026-0396
  * CVE-2026-0397
  * CVE-2026-24028
  * CVE-2026-24029
  * CVE-2026-24030
  * CVE-2026-27853
  * CVE-2026-27854

CVSS scores:

  * CVE-2026-0396 ( SUSE ):  2.1
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-0396 ( SUSE ):  3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
  * CVE-2026-0396 ( NVD ):  3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
  * CVE-2026-0396 ( NVD ):  4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
  * CVE-2026-0397 ( SUSE ):  2.1
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-0397 ( SUSE ):  3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
  * CVE-2026-0397 ( NVD ):  3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
  * CVE-2026-0397 ( NVD ):  4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
  * CVE-2026-24028 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-24028 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-24028 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-24028 ( NVD ):  8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
  * CVE-2026-24029 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-24029 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-24029 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-24029 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-24030 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-24030 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-24030 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-24030 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-27853 ( SUSE ):  8.2
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-27853 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-27853 ( NVD ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-27853 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-27854 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-27854 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
  * CVE-2026-27854 ( NVD ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
  * CVE-2026-27854 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products:

  * Basesystem Module 15-SP7
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

An update that solves seven vulnerabilities can now be installed.

## Description:

This update for dnsdist fixes the following issues:

Update to version 1.9.12.

  * https://www.dnsdist.org/changelog.html#change-1.9.12

Security issues fixed:

  * CVE-2026-0396: crafted DNS queries triggering domain-based dynamic rules can
    lead to HTML injection in the web dashboard (bsc#1261236).
  * CVE-2026-0397: misconfiguration of the CORS policy can lead to information
    disclosure (bsc#1261237).
  * CVE-2026-24028: crafted DNS packet parsed by Lua code using
    `newDNSPacketOverlay` can lead to an out-of-bounds read (bsc#1261238).
  * CVE-2026-24029: disabled option on a DNS over HTTPS nghttp2 frontend allows
    clients to bypass ACLs and send DoH queries (bsc#1261239).
  * CVE-2026-24030: crafted DoQ and DoH3 queries can lead to unbounded memory
    allocation and DoS (bsc#1261240).
  * CVE-2026-27853: crafted DNS responses sent to a DNSdist using certain
    methods in custom Lua code (`changeName`) can lead to an out-of-bounds write
    (bsc#1261243).
  * CVE-2026-27854: crafted DNS queries sent to a DNSdist using the
    `DNSQuestion:getEDNSOptions` method in custom Lua code can lead to a use-
    after-free (bsc#1261241).

## 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:

  * Basesystem Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-1618=1

## Package List:

  * Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)
    * dnsdist-debugsource-1.9.12-150700.3.9.1
    * dnsdist-debuginfo-1.9.12-150700.3.9.1
    * dnsdist-1.9.12-150700.3.9.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-0396.html
  * https://www.suse.com/security/cve/CVE-2026-0397.html
  * https://www.suse.com/security/cve/CVE-2026-24028.html
  * https://www.suse.com/security/cve/CVE-2026-24029.html
  * https://www.suse.com/security/cve/CVE-2026-24030.html
  * https://www.suse.com/security/cve/CVE-2026-27853.html
  * https://www.suse.com/security/cve/CVE-2026-27854.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1261236
  * https://bugzilla.suse.com/show_bug.cgi?id=1261237
  * https://bugzilla.suse.com/show_bug.cgi?id=1261238
  * https://bugzilla.suse.com/show_bug.cgi?id=1261239
  * https://bugzilla.suse.com/show_bug.cgi?id=1261240
  * https://bugzilla.suse.com/show_bug.cgi?id=1261241
  * https://bugzilla.suse.com/show_bug.cgi?id=1261243

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