CVE-2026-44601: CWE-837 Improper Enforcement of a Single, Unique Action in torproject Tor
A vulnerability in Tor versions before 0.4.9.7 can cause a client crash due to a double close of a circuit when circuit queue memory pressure occurs. This issue is classified under CWE-837, indicating improper enforcement of a single, unique action. The vulnerability has a low severity rating and a CVSS score of 3.7, reflecting limited impact and exploitability. No known exploits are reported in the wild. There is no explicit vendor advisory or patch information available at this time.
AI Analysis
Technical Summary
CVE-2026-44601 describes a vulnerability in the Tor software prior to version 0.4.9.7 where, under conditions of circuit queue memory pressure, the client may crash due to a double close operation on a circuit. This is categorized as CWE-837, which involves improper enforcement of a single, unique action, leading to resource management errors. The vulnerability does not affect confidentiality, integrity, but impacts availability with a low severity level. No patch or official remediation level has been documented in the provided data.
Potential Impact
The vulnerability can cause a denial of service by crashing the Tor client when memory pressure triggers a double close of a circuit. There is no indication of compromise to confidentiality or integrity. No known exploits have been observed in the wild, and the impact is limited to availability disruption with low severity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or workaround is documented, users should monitor the Tor project’s advisories for updates and consider upgrading to version 0.4.9.7 or later once available to address this issue.
CVE-2026-44601: CWE-837 Improper Enforcement of a Single, Unique Action in torproject Tor
Description
A vulnerability in Tor versions before 0.4.9.7 can cause a client crash due to a double close of a circuit when circuit queue memory pressure occurs. This issue is classified under CWE-837, indicating improper enforcement of a single, unique action. The vulnerability has a low severity rating and a CVSS score of 3.7, reflecting limited impact and exploitability. No known exploits are reported in the wild. There is no explicit vendor advisory or patch information available at this time.
CVSS v3.1
Score 3.7low
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-44601 describes a vulnerability in the Tor software prior to version 0.4.9.7 where, under conditions of circuit queue memory pressure, the client may crash due to a double close operation on a circuit. This is categorized as CWE-837, which involves improper enforcement of a single, unique action, leading to resource management errors. The vulnerability does not affect confidentiality, integrity, but impacts availability with a low severity level. No patch or official remediation level has been documented in the provided data.
Potential Impact
The vulnerability can cause a denial of service by crashing the Tor client when memory pressure triggers a double close of a circuit. There is no indication of compromise to confidentiality or integrity. No known exploits have been observed in the wild, and the impact is limited to availability disruption with low severity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or workaround is documented, users should monitor the Tor project’s advisories for updates and consider upgrading to version 0.4.9.7 or later once available to address this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-05-07T03:09:50.703Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fc1394cbff5d8610732765
Added to database: 05/07/2026, 04:22:44 UTC
Last enriched: 05/14/2026, 10:48:41 UTC
Last updated: 06/24/2026, 20:05:57 UTC
Views: 86
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