Bug 2525577 (CVE-2026-73209)

Summary: CVE-2026-73209 dovecot: Dovecot: Denial of Service via crafted compressed data
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: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Dovecot. An authenticated attacker can send specially crafted compressed data, leading to the affected process exhausting its stack and crashing. This termination of the process can result in degradation or a complete denial of service for the IMAP (Internet Message Access Protocol) service.
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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: 2526692    
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Description OSIDB Bzimport 2026-08-28 11:23:50 UTC
An attacker that has valid credentials can send crafted compressed data that causes the affected process to exhaust its stack and crash. The affected process is terminated, which can cause degradation or denial of service for IMAP. Update to non-vulnerable version. No publicly available exploits are known.