SUSE dnsmasq Important DoS Buffer Overflow Vuln 2026-1934-1
suse
May 18, 2026
An update that solves seven vulnerabilities, contains one feature and has two security fixes can now be installed.
Summary
## 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.
Topics Covered
References
* bsc#1247812
* bsc#1257934
* bsc#1258251
* bsc#1262487
* bsc#1265001
* bsc#1265002
* bsc#1265003
* bsc#1265004
* bsc#1265006
* jsc#PED-266
Cross-
* 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
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Severity
important
Lowest
Low
Medium
High
Critical
Announcement ID: SUSE-SU-2026:1934-1
Release Date: 2026-05-18T07:40:18Z
Rating: important
Topics Covered
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