CVE-2026-77641
- State
- Published
- Severity
- 6.5 Medium
- Published
- Aug 20, 2026
- Updated
- Aug 27, 2026
- Reserved
- Aug 20, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H | mitre |
Weaknesses
- CWE-252 Unchecked Return Value
Affected Products
| Product | Versions |
|---|---|
Tortorproject |
|
References
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