Description
tor before 0.4.9.9 was prone to a NULL write after free when sending a CONFLUX_SWITCH cell fails. The return value of relay_send_command_from_edge() was ignored, so a send failure (which calls circuit_mark_for_close() and removes the leg via cfx_del_leg()) would go undetected, causing the caller to write to the now-freed current leg and resulting in a crash. This is TROVE-2026-017.
CVSS 6.5EPSS 0.194%Risk 0.66
View source- Published
- 2026-08-20 21:17:11
- Affected versions
- <0.4.9.9
- Type
- Critical software
- Last modified
- 2026-08-27 17:20:25
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H