Security Advisory

CVE-2026-77641

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-20 21:09:41

Last updated 2026-08-20 21:09:41

Assigner mitre

CVSS score 6.5

State PUBLISHED

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.

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