{"action":"Upgrade thunderbird to 1:115.6.0-1 or later.","affected":[{"fixed":"1:115.6.0-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:115.6.0-1"],"id":"tcs_01M5NJZPMXW21SSSYFCRMNHA91","modified_at":"2026-10-23T18:04:32.458066891Z","published_at":"2023-12-19T14:15:07.377Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2023-6857","https://security-tracker.debian.org/tracker/CVE-2023-6857"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2023-6857#Debian:14/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2023-6857"}],"summary":"When resolving a symlink, a race may occur where the buffer passed to `readlink` may actually be smaller than necessary. *This bug only affects Firefox on Unix-based operating systems (Android, Linux,"}