{"id":"DEBIAN-CVE-2026-70368","details":"A stack-based out-of-bounds read vulnerability exists in the \"s_vlog\" function of stunnel, when handling oversized log messages via \"vsnprintf\". A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing \"\\n\" characters with \"\\0\".","modified":"2026-10-01T03:03:48.797444978Z","published":"2026-08-04T14:16:32.693Z","upstream":["CVE-2026-70368"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-70368"}],"affected":[{"package":{"name":"stunnel","ecosystem":"Debian:14","purl":"pkg:deb/debian/stunnel?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3:5.80-1"}]}],"versions":["2:3.26-10","2:3.26-11","2:3.26-2","2:3.26-2.1","2:3.26-3","2:3.26-4","2:3.26-5","2:3.26-6","2:3.26-7","2:3.26-8","2:3.26-9","2:3.26-dfsg-1","2:3.26-dfsg-2","3.10-0potato1","3.22-1","3:5.78-3","3:5.78-4","3:5.78-5","3:5.79-1","3:5.79-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-70368.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"}]}