Bug 2547200 (CVE-2026-106585)

Summary: CVE-2026-106585 openssh: openssh: Denial of service via oversized decompressed packets
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, 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 remote attacker can trigger a denial of service (DoS) or abnormal packet processing by transmitting crafted, highly compressed data to a vulnerable client or server. The application fails to verify that decompressed payloads remain within the maximum permitted packet length limits, allowing oversized packets to be processed.
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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: 2555580    
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Description OSIDB Bzimport 2026-10-06 21:02:06 UTC
In sshd and ssh in OpenSSH before 10.6, there is no check for whether the maximum packet length is exceeded during decompression of highly compressed data.