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glibc: glibc DNS stub resolver: Denial of Service via long search domain in configuration

🗓️ 21 Sep 2026 10:50:48Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 18 Views

glibc DNS stub resolver DoS via long search domain in /etc/resolv.conf or LOCALDOMAIN.

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Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Hardened Imagesanyaarch64compat-libpthread-nonshared2.43-8.6.hum1compat-libpthread-nonshared-2.43-8.6.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64compat-libpthread-nonshared2.43-8.6.hum1compat-libpthread-nonshared-2.43-8.6.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64glibc2.43-8.6.hum1glibc-2.43-8.6.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64glibc2.43-8.6.hum1glibc-2.43-8.6.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64glibc-all-langpacks2.43-8.6.hum1glibc-all-langpacks-2.43-8.6.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64glibc-all-langpacks2.43-8.6.hum1glibc-all-langpacks-2.43-8.6.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64glibc-benchtests2.43-8.6.hum1glibc-benchtests-2.43-8.6.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64glibc-benchtests2.43-8.6.hum1glibc-benchtests-2.43-8.6.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64glibc-common2.43-8.6.hum1glibc-common-2.43-8.6.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64glibc-common2.43-8.6.hum1glibc-common-2.43-8.6.hum1.x86_64.rpm
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16 Oct 2026 12:21Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.3
EPSS0.00315
SSVC
18