SUSE alert SUSE-SU-2026:1934-1 (dnsmasq)
| From: | OPENSUSE-SECURITY-UPDATES <null@suse.de> | |
| To: | security-announce@lists.opensuse.org | |
| Subject: | SUSE-SU-2026:1934-1: important: Security update for dnsmasq | |
| Date: | Mon, 18 May 2026 12:34:01 -0000 | |
| Message-ID: | <177910764135.1910.11102856394773805816@dfa970252cab> | |
| Archive-link: | Article |
# 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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