SUSE-SU-2026:1934-1: important: Security update for dnsmasq
SLE-UPDATES
null at suse.de
Mon May 18 12:34:00 UTC 2026
# Security update for dnsmasq
Announcement ID: SUSE-SU-2026:1934-1
Release Date: 2026-05-18T07:40:18Z
Rating: important
References:
* bsc#1247812
* bsc#1257934
* bsc#1258251
* bsc#1262487
* bsc#1265001
* bsc#1265002
* bsc#1265003
* bsc#1265004
* bsc#1265006
* jsc#PED-266
Cross-References:
* CVE-2026-2291
* CVE-2026-4890
* CVE-2026-4891
* CVE-2026-4892
* CVE-2026-4893
* CVE-2026-5172
* CVE-2026-6507
CVSS scores:
* CVE-2026-2291 ( SUSE ): 9.2
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
* CVE-2026-2291 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-2291 ( NVD ): 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
* CVE-2026-4890 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-4890 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-4891 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-4891 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-4892 ( SUSE ): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-4892 ( NVD ): 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-4893 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-4893 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-5172 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-5172 ( NVD ): 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
* CVE-2026-6507 ( 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-2026-6507 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-6507 ( 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
* openSUSE Leap 15.4
* SUSE Linux Enterprise Desktop 15 SP7
* SUSE Linux Enterprise High Performance Computing 15 SP4
* SUSE Linux Enterprise High Performance Computing 15 SP5
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
* SUSE Linux Enterprise Micro 5.3
* SUSE Linux Enterprise Micro 5.4
* SUSE Linux Enterprise Micro 5.5
* SUSE Linux Enterprise Micro for Rancher 5.3
* SUSE Linux Enterprise Micro for Rancher 5.4
* SUSE Linux Enterprise Real Time 15 SP7
* SUSE Linux Enterprise Server 15 SP4
* SUSE Linux Enterprise Server 15 SP4 LTSS
* SUSE Linux Enterprise Server 15 SP5
* SUSE Linux Enterprise Server 15 SP5 LTSS
* SUSE Linux Enterprise Server 15 SP6
* SUSE Linux Enterprise Server 15 SP6 LTSS
* SUSE Linux Enterprise Server 15 SP7
* SUSE Linux Enterprise Server for SAP Applications 15 SP4
* SUSE Linux Enterprise Server for SAP Applications 15 SP5
* SUSE Linux Enterprise Server for SAP Applications 15 SP6
* SUSE Linux Enterprise Server for SAP Applications 15 SP7
An update that solves seven vulnerabilities, contains one feature and has two
security fixes can now be installed.
## Description:
This update for dnsmasq fixes the following issues
Security issues:
* CVE-2026-4890: DoS vulnerability in the DNSSEC validation (bsc#1265001).
* CVE-2026-4891: heap-based out-of-bounds read vulnerability in the DNSSEC
validation (bsc#1265002).
* CVE-2026-4892: heap-based out-of-bounds write vulnerability in the DHCPv6
implementation (bsc#1265003).
* CVE-2026-4893: information disclosure vulnerability in dnsmasq allows remote
attackers to bypass source checks (bsc#1265004).
* CVE-2026-5172: buffer overflow in dnsmasq's extract_addresses() function
(bsc#1265006).
* CVE-2026-6507: out-of-bounds write in DHCP BOOTREPLY processing can lead to
denial of service (bsc#1262487).
Non security issues:
* Updated to security release 2.92rel2.
* aardvark-dns upstream tests make dnsmasq dump core (bsc#1247812).
* Drop rcFOO symlinks for CODE16 (jsc#PED-266).
* libnettle: update to 4.0 breaks dnsmasq and gnutls (bsc#1257934).
## 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 15 SP6 LTSS
zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-1934=1
* SUSE Linux Enterprise Server for SAP Applications 15 SP4
zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-1934=1
* SUSE Linux Enterprise Server for SAP Applications 15 SP5
zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-1934=1
* SUSE Linux Enterprise Server for SAP Applications 15 SP6
zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-1934=1
* openSUSE Leap 15.4
zypper in -t patch SUSE-2026-1934=1
* SUSE Linux Enterprise Micro for Rancher 5.3
zypper in -t patch SUSE-SLE-Micro-5.3-2026-1934=1
* SUSE Linux Enterprise Micro 5.3
zypper in -t patch SUSE-SLE-Micro-5.3-2026-1934=1
* SUSE Linux Enterprise Micro for Rancher 5.4
zypper in -t patch SUSE-SLE-Micro-5.4-2026-1934=1
* SUSE Linux Enterprise Micro 5.4
zypper in -t patch SUSE-SLE-Micro-5.4-2026-1934=1
* SUSE Linux Enterprise Micro 5.5
zypper in -t patch SUSE-SLE-Micro-5.5-2026-1934=1
* Basesystem Module 15-SP7
zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-1934=1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-1934=1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-1934=1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-1934=1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-1934=1
* SUSE Linux Enterprise Server 15 SP4 LTSS
zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-1934=1
* SUSE Linux Enterprise Server 15 SP5 LTSS
zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-1934=1
## Package List:
* SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* openSUSE Leap 15.4 (aarch64 ppc64le s390x x86_64 i586)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-utils-debuginfo-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* dnsmasq-utils-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise Micro for Rancher 5.3 (aarch64 s390x x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise Micro 5.3 (aarch64 s390x x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise Micro for Rancher 5.4 (aarch64 s390x x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise Micro 5.4 (aarch64 s390x x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64
x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64
x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64
x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64
x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
* SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
* dnsmasq-2.92rel2-150400.16.12.1
* dnsmasq-debuginfo-2.92rel2-150400.16.12.1
## References:
* https://www.suse.com/security/cve/CVE-2026-2291.html
* https://www.suse.com/security/cve/CVE-2026-4890.html
* https://www.suse.com/security/cve/CVE-2026-4891.html
* https://www.suse.com/security/cve/CVE-2026-4892.html
* https://www.suse.com/security/cve/CVE-2026-4893.html
* https://www.suse.com/security/cve/CVE-2026-5172.html
* https://www.suse.com/security/cve/CVE-2026-6507.html
* https://bugzilla.suse.com/show_bug.cgi?id=1247812
* https://bugzilla.suse.com/show_bug.cgi?id=1257934
* https://bugzilla.suse.com/show_bug.cgi?id=1258251
* https://bugzilla.suse.com/show_bug.cgi?id=1262487
* https://bugzilla.suse.com/show_bug.cgi?id=1265001
* https://bugzilla.suse.com/show_bug.cgi?id=1265002
* https://bugzilla.suse.com/show_bug.cgi?id=1265003
* https://bugzilla.suse.com/show_bug.cgi?id=1265004
* https://bugzilla.suse.com/show_bug.cgi?id=1265006
* https://jira.suse.com/browse/PED-266
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