CVE-2015-2929: Torproject Tor

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

The Hidden Service (HS) client implementation in Tor before 0.2.4.27, 0.2.5.x before 0.2.5.12, and 0.2.6.x before 0.2.6.7 allows remote servers to cause a denial of service (assertion failure and application exit) via a malformed HS descriptor.

Affected products

• Torproject Tor: before 0.2.4.27 (fixed in 0.2.4.27); from 0.2.5.1, before 0.2.5.12 (fixed in 0.2.5.12); from 0.2.6.1, before 0.2.6.7 (fixed in 0.2.6.7)

Published 2020-01-24. Last modified 2026-06-17.