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openssh: OpenSSH: Use-after-free vulnerability during host key re-exchange on the client side

🗓️ 29 Jul 2026 23:25:37Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 6 Views

OpenSSH use-after-free during host key re-exchange when the server changes its key, affecting confidentiality and integrity with low availability.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.8aarch64openssh9.9p1-9.el9_8openssh-9.9p1-9.el9_8.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64leopenssh9.9p1-9.el9_8openssh-9.9p1-9.el9_8.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xopenssh9.9p1-9.el9_8openssh-9.9p1-9.el9_8.s390x.rpm
Red Hat Enterprise Linux9.8x86_64openssh9.9p1-9.el9_8openssh-9.9p1-9.el9_8.x86_64.rpm
Red Hat Enterprise Linux9.8aarch64openssh-askpass9.9p1-9.el9_8openssh-askpass-9.9p1-9.el9_8.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64leopenssh-askpass9.9p1-9.el9_8openssh-askpass-9.9p1-9.el9_8.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xopenssh-askpass9.9p1-9.el9_8openssh-askpass-9.9p1-9.el9_8.s390x.rpm
Red Hat Enterprise Linux9.8x86_64openssh-askpass9.9p1-9.el9_8openssh-askpass-9.9p1-9.el9_8.x86_64.rpm
Red Hat Enterprise Linux9.8aarch64openssh-askpass-debuginfo9.9p1-9.el9_8openssh-askpass-debuginfo-9.9p1-9.el9_8.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64leopenssh-askpass-debuginfo9.9p1-9.el9_8openssh-askpass-debuginfo-9.9p1-9.el9_8.ppc64le.rpm
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30 Jul 2026 08:22Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.7 - 9.4
EPSS0.003
SSVC
6