NULL Write After Free in Tor Relay Leading to Crash
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| torproject | Tor | unaffected |
|
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Torproject | Tor |
|
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.353% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| Title | NULL Write After Free in Tor Relay Leading to Crash |
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| First Time appeared |
Torproject
Torproject tor |
|
| Weaknesses | CWE-252 | |
| CPEs | cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Torproject
Torproject tor |
|
| References |
| |
| Metrics |
cvssV3_1
|