CVE-2026-44601 PUBLISHED

Assigner: mitre
Reserved: 07.05.2026 Published: 07.05.2026 Updated: 07.05.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS Score: 3.7

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	torproject
Product	Tor
Versions	Default: unaffected affected from 0 to 0.4.9.7 (excl.)

References

https://forum.torproject.org/c/news/tor-release-announcement/28
https://www.openwall.com/lists/oss-security/2026/05/06/8
https://gitlab.torproject.org/tpo/core/tor/-/work_items/41237
https://gitlab.torproject.org/tpo/core/tor/-/commit/d4e3f6a440b58c2be661decf20c09548704907dc

Problem Types

CWE-837 Improper Enforcement of a Single, Unique Action CWE