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libssh: libssh: Denial of Service via inefficient regular expression processing

🗓️ 19 May 2026 09:10:57Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 12 Views

Libssh DoS through inefficient regex in match_pattern by crafted hostnames in config or known_hosts.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10aarch64libssh0.12.0-2.el10libssh-0.12.0-2.el10.aarch64.rpm
Red Hat Enterprise Linux10ppc64lelibssh0.12.0-2.el10libssh-0.12.0-2.el10.ppc64le.rpm
Red Hat Enterprise Linux10s390xlibssh0.12.0-2.el10libssh-0.12.0-2.el10.s390x.rpm
Red Hat Enterprise Linux10x86_64libssh0.12.0-2.el10libssh-0.12.0-2.el10.x86_64.rpm
Red Hat Enterprise Linux10noarchlibssh-config0.12.0-2.el10libssh-config-0.12.0-2.el10.noarch.rpm
Red Hat Enterprise Linux10aarch64libssh-debuginfo0.12.0-2.el10libssh-debuginfo-0.12.0-2.el10.aarch64.rpm
Red Hat Enterprise Linux10ppc64lelibssh-debuginfo0.12.0-2.el10libssh-debuginfo-0.12.0-2.el10.ppc64le.rpm
Red Hat Enterprise Linux10s390xlibssh-debuginfo0.12.0-2.el10libssh-debuginfo-0.12.0-2.el10.s390x.rpm
Red Hat Enterprise Linux10x86_64libssh-debuginfo0.12.0-2.el10libssh-debuginfo-0.12.0-2.el10.x86_64.rpm
Red Hat Enterprise Linux10aarch64libssh-debugsource0.12.0-2.el10libssh-debugsource-0.12.0-2.el10.aarch64.rpm
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03 Jul 2026 00:38Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.15.5
CVSS 32.2
EPSS0.00223
SSVC
12