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httpd: mod_md: unrestricted OCSP response leads to resource exhaustion

🗓️ 29 Jun 2026 02:55:47Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 13 Views

Flaw in the httpd mod_md module causes memory exhaustion and denial of service from unrestricted OCSP responses.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.8aarch64mod_md1:2.4.26-2.el9_8.1mod_md-1:2.4.26-2.el9_8.1.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64lemod_md1:2.4.26-2.el9_8.1mod_md-1:2.4.26-2.el9_8.1.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xmod_md1:2.4.26-2.el9_8.1mod_md-1:2.4.26-2.el9_8.1.s390x.rpm
Red Hat Enterprise Linux9.8x86_64mod_md1:2.4.26-2.el9_8.1mod_md-1:2.4.26-2.el9_8.1.x86_64.rpm
Red Hat Enterprise Linux9.8aarch64mod_md-debuginfo1:2.4.26-2.el9_8.1mod_md-debuginfo-1:2.4.26-2.el9_8.1.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64lemod_md-debuginfo1:2.4.26-2.el9_8.1mod_md-debuginfo-1:2.4.26-2.el9_8.1.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xmod_md-debuginfo1:2.4.26-2.el9_8.1mod_md-debuginfo-1:2.4.26-2.el9_8.1.s390x.rpm
Red Hat Enterprise Linux9.8x86_64mod_md-debuginfo1:2.4.26-2.el9_8.1mod_md-debuginfo-1:2.4.26-2.el9_8.1.x86_64.rpm
Red Hat Enterprise Linux9.8aarch64mod_md-debugsource1:2.4.26-2.el9_8.1mod_md-debugsource-1:2.4.26-2.el9_8.1.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64lemod_md-debugsource1:2.4.26-2.el9_8.1mod_md-debugsource-1:2.4.26-2.el9_8.1.ppc64le.rpm
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21 Aug 2026 02:16Current
7High risk
Vulners AI Score7
CVSS 3.17.3
EPSS0.00628
SSVC
13