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glibc: glibc: Incorrect DNS response parsing via crafted DNS server response

🗓️ 19 May 2026 14:41:51Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 11 Views

A crafted DNS response makes GNU C Library gethostbyaddr misinterpret a non-answer as an answer.

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Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.2aarch64glibc2.39-121.el10_2glibc-2.39-121.el10_2.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64leglibc2.39-121.el10_2glibc-2.39-121.el10_2.ppc64le.rpm
Red Hat Enterprise Linux10.2s390xglibc2.39-121.el10_2glibc-2.39-121.el10_2.s390x.rpm
Red Hat Enterprise Linux10.2x86_64glibc2.39-121.el10_2glibc-2.39-121.el10_2.x86_64.rpm
Red Hat Enterprise Linux10.2aarch64glibc-all-langpacks2.39-121.el10_2glibc-all-langpacks-2.39-121.el10_2.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64leglibc-all-langpacks2.39-121.el10_2glibc-all-langpacks-2.39-121.el10_2.ppc64le.rpm
Red Hat Enterprise Linux10.2s390xglibc-all-langpacks2.39-121.el10_2glibc-all-langpacks-2.39-121.el10_2.s390x.rpm
Red Hat Enterprise Linux10.2x86_64glibc-all-langpacks2.39-121.el10_2glibc-all-langpacks-2.39-121.el10_2.x86_64.rpm
Red Hat Enterprise Linux10.2aarch64glibc-benchtests2.39-121.el10_2glibc-benchtests-2.39-121.el10_2.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64leglibc-benchtests2.39-121.el10_2glibc-benchtests-2.39-121.el10_2.ppc64le.rpm
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26 Jul 2026 14:13Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
EPSS0.00325
SSVC
11