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unbound: Heap overflow and crash with multiple nsid, cookie, padding EDNS options

🗓️ 04 Jun 2026 08:54:04Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 11 Views

Unbound DNS resolver can heap overflow and crash from crafted replies with multiple name server identifier or dns extension options.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.2aarch64python3-unbound1.24.2-7.el10_2.1python3-unbound-1.24.2-7.el10_2.1.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64lepython3-unbound1.24.2-7.el10_2.1python3-unbound-1.24.2-7.el10_2.1.ppc64le.rpm
Red Hat Enterprise Linux10.2s390xpython3-unbound1.24.2-7.el10_2.1python3-unbound-1.24.2-7.el10_2.1.s390x.rpm
Red Hat Enterprise Linux10.2x86_64python3-unbound1.24.2-7.el10_2.1python3-unbound-1.24.2-7.el10_2.1.x86_64.rpm
Red Hat Enterprise Linux10.2aarch64python3-unbound-debuginfo1.24.2-7.el10_2.1python3-unbound-debuginfo-1.24.2-7.el10_2.1.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64lepython3-unbound-debuginfo1.24.2-7.el10_2.1python3-unbound-debuginfo-1.24.2-7.el10_2.1.ppc64le.rpm
Red Hat Enterprise Linux10.2s390xpython3-unbound-debuginfo1.24.2-7.el10_2.1python3-unbound-debuginfo-1.24.2-7.el10_2.1.s390x.rpm
Red Hat Enterprise Linux10.2x86_64python3-unbound-debuginfo1.24.2-7.el10_2.1python3-unbound-debuginfo-1.24.2-7.el10_2.1.x86_64.rpm
Red Hat Enterprise Linux10.2aarch64unbound1.24.2-7.el10_2.1unbound-1.24.2-7.el10_2.1.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64leunbound1.24.2-7.el10_2.1unbound-1.24.2-7.el10_2.1.ppc64le.rpm
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30 Jun 2026 04:25Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
CVSS 48.7
EPSS0.00842
SSVC
11