{"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_01M5NJZP244Z92FM185W8EE391","modified_at":"2026-10-23T18:04:32.509605187Z","published_at":"2023-12-19T14:15:07.313Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2023-6856","https://security-tracker.debian.org/tracker/CVE-2023-6856"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2023-6856#Debian:14/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2023-6856"}],"summary":"The WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and"}