{"action":"Upgrade tor to 0.4.9.9-1 or later.","affected":[{"fixed":"0.4.9.9-1","introduced":"0"}],"component":"tor","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["0.4.9.9-1"],"id":"tcs_01M5NVEAHNRPZ9TZ8PEBCF3TC0","modified_at":"2026-10-23T17:47:21.505111402Z","published_at":"2026-08-20T21:17:11.517Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-77641","https://security-tracker.debian.org/tracker/CVE-2026-77641"],"severity":{"label":"high","score":8.2},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-77641#Debian:14/tor","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-77641"}],"summary":"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"}