VulnerabilityAnalyzed
CVE-2026-44601
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.
HIGH 7.5EPSS 0.34%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.34% probability · 27th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-837
- Affected
- torproject/tor
- Source
- cve@mitre.org
References
- https://forum.torproject.org/c/news/tor-release-announcement/28Release Notes
- https://gitlab.torproject.org/tpo/core/tor/-/commit/d4e3f6a440b58c2be661decf20c09548704907dcPatch
- https://gitlab.torproject.org/tpo/core/tor/-/work_items/41237Not Applicable
- https://www.openwall.com/lists/oss-security/2026/05/06/8Mailing List, Release Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.