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unbound: Unbound: Remote Code Execution Vulnerability in CNAME Synthesis

🗓️ 23 Sep 2026 14:12:22Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 3 Views

Remote RCE in Unbound via heap memory corruption during CNAME synthesis.

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Refs
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Family
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19 Sep 202615:00
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21 Sep 202600:00
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Fedora 45 : unbound (2026-3baacede89)
20 Sep 202600:00
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.10aarch64python3-unbound1.16.2-5.14.el8_10.4python3-unbound-1.16.2-5.14.el8_10.4.aarch64.rpm
Red Hat Enterprise Linux8.10ppc64lepython3-unbound1.16.2-5.14.el8_10.4python3-unbound-1.16.2-5.14.el8_10.4.ppc64le.rpm
Red Hat Enterprise Linux8.10s390xpython3-unbound1.16.2-5.14.el8_10.4python3-unbound-1.16.2-5.14.el8_10.4.s390x.rpm
Red Hat Enterprise Linux8.10x86_64python3-unbound1.16.2-5.14.el8_10.4python3-unbound-1.16.2-5.14.el8_10.4.x86_64.rpm
Red Hat Enterprise Linux8.10aarch64python3-unbound-debuginfo1.16.2-5.14.el8_10.4python3-unbound-debuginfo-1.16.2-5.14.el8_10.4.aarch64.rpm
Red Hat Enterprise Linux8.10i686python3-unbound-debuginfo1.16.2-5.14.el8_10.4python3-unbound-debuginfo-1.16.2-5.14.el8_10.4.i686.rpm
Red Hat Enterprise Linux8.10ppc64lepython3-unbound-debuginfo1.16.2-5.14.el8_10.4python3-unbound-debuginfo-1.16.2-5.14.el8_10.4.ppc64le.rpm
Red Hat Enterprise Linux8.10s390xpython3-unbound-debuginfo1.16.2-5.14.el8_10.4python3-unbound-debuginfo-1.16.2-5.14.el8_10.4.s390x.rpm
Red Hat Enterprise Linux8.10x86_64python3-unbound-debuginfo1.16.2-5.14.el8_10.4python3-unbound-debuginfo-1.16.2-5.14.el8_10.4.x86_64.rpm
Red Hat Enterprise Linux8.10aarch64unbound1.16.2-5.14.el8_10.4unbound-1.16.2-5.14.el8_10.4.aarch64.rpm
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23 Sep 2026 17:45Current
6.6Medium risk
Vulners AI Score6.6
CVSS 49.5
EPSS0.00402
SSVC
3