CVE-2026-77641
8.2
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Exploitability: 3.9 / Impact: 4.2
Source: NVD
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.
Affected (1)
Products: Torproject: Tor
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| version < 0.4.9.9 |
References (1)
Source: cve@mitre.org
Release NotesVendor Advisory
Timeline
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