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Alerts This Week
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Oracle Linux 9 ELSA-2026-19373 DNSMasq Important Overflow DoS

oracle
Calendar Grey June 24, 2026
Oracle Linux Logo Esm H88
Oracle Linux 9 has released an advisory for dnsmasq addressing important issues including DoS and overflow risks.
The following updated rpms for Oracle Linux 9 have been uploaded to the Unbreakable Linux Network:

Summary

[2.85-18.1] - Prevent overflow in extract_name function (CVE-2026-2291) - Prevent DoS in DNSSEC validation (CVE-2026-4890) - Prevent out-of-bounds read in DNSSEC validation (CVE-2026-4891) - Prevent out-of-bounds write in DHCPv6 server (CVE-2026-4892) - Prevent source check avoidance by RFC 7871 client-subnet (CVE-2026-4893)

Topics%20covered

Topics Covered

security advisory DoS important overflow Oracle dnsmasq

SRPMs

http://oss.oracle.com/ol9/SRPMS-updates/dnsmasq-2.85-18.el9_8.1.src.rpm

x86_64

dnsmasq-2.85-18.el9_8.1.x86_64.rpm dnsmasq-utils-2.85-18.el9_8.1.x86_64.rpm

aarch64

dnsmasq-2.85-18.el9_8.1.aarch64.rpm dnsmasq-utils-2.85-18.el9_8.1.aarch64.rpm

Severity
important
Lowest
Low
Medium
High
Critical

Related CVEs: CVE-2026-2291 CVE-2026-4890 CVE-2026-4891 CVE-2026-4892 CVE-2026-4893

Topics%20covered

Topics Covered

security advisory DoS important overflow Oracle dnsmasq

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