{"apiVersion":"1.0","identifier":"CVE-2026-77641","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.","publishedAt":"2026-08-20T21:17:11","lastModifiedAt":"2026-08-27T17:20:25","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77641","cvssScore":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","epssProbability":0.00194,"riskScore":0.66,"affectedProduct":"Tor","affectedVersions":"<0.4.9.9","vulnerabilityType":"Critical software","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-77641","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-77641","en":"https://www.redsauce.net/en/cves/CVE-2026-77641","fr":"https://www.redsauce.net/fr/cves/CVE-2026-77641","pt":"https://www.redsauce.net/pt/cves/CVE-2026-77641","de":"https://www.redsauce.net/de/cves/CVE-2026-77641","sk":"https://www.redsauce.net/sk/cves/CVE-2026-77641","el":"https://www.redsauce.net/el/cves/CVE-2026-77641"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-77641"}}