Bug 2467626 (CVE-2026-44601)

Summary: CVE-2026-44601 Tor: Tor: Client crash due to double close of a circuit
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: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Tor. When the system experiences circuit queue memory pressure, a remote attacker could potentially trigger a double close of a circuit, leading to a client crash. This vulnerability can result in a Denial of Service (DoS) for affected Tor clients.
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Bug Depends On: 2467731, 2467732    
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Description OSIDB Bzimport 2026-05-07 05:02:10 UTC
Tor before 0.4.9.7, when circuit queue memory pressure exists, can experience a client crash because of a double close of a circuit, aka TROVE-2026-009.