Bug 2514328 (CVE-2026-73282)

Summary: CVE-2026-73282 openssh: OpenSSH: Information disclosure and data corruption via use-after-free in ssh client
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, kshier, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, stcannon, suppawar, teagle, vlaad, watson-tool-maintainers, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OpenSSH. A use-after-free vulnerability exists in the `ssh` client when handling concurrent remote-forwarding operations. This can occur if a remote forwarding is added via the local session multiplexing socket while a remote forwarding open request is pending with the server. A remote attacker with high attack complexity could potentially exploit this to achieve low impact on confidentiality and integrity.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2517529, 2517530    
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Description OSIDB Bzimport 2026-08-11 19:32:02 UTC
In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent.