{"id":"DEBIAN-CVE-2026-78002","details":"A flaw was found in rsyslog. An unauthenticated remote attacker can trigger a heap buffer overflow in the RainerScript `replace()` function by sending specially crafted syslog messages. This vulnerability arises from an incorrect buffer size calculation during string replacement, causing memory corruption. Successful exploitation can lead to a denial of service (DoS) for the affected system.","modified":"2026-09-26T08:47:35.994629553Z","published":"2026-08-27T17:20:29.367Z","upstream":["CVE-2026-78002"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-78002"}],"affected":[{"package":{"name":"rsyslog","ecosystem":"Debian:12","purl":"pkg:deb/debian/rsyslog?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.2302.0-1","8.2302.0-1+deb12u1","8.2304.0-1","8.2306.0-1","8.2306.0-2","8.2308.0-1","8.2310.0-1","8.2310.0-2","8.2310.0-3","8.2310.0-4","8.2312.0-1","8.2312.0-2","8.2312.0-3","8.2402.0-1","8.2404.0-1","8.2404.0-2","8.2406.0-1","8.2408.0-1","8.2408.0-2","8.2410.0-1","8.2412.0-1","8.2412.0-2","8.2502.0-1","8.2502.0-2","8.2502.0-3","8.2502.0-4","8.2502.0-5","8.2502.0-6","8.2504.0-1","8.2506.0-1","8.2506.0-2","8.2506.0-3","8.2506.0-4","8.2506.0-6","8.2510.0-1","8.2510.0-2","8.2510.0-3","8.2510.0-4","8.2510.0-5","8.2512.0-1","8.2512.0-2","8.2512.0-3","8.2602.0-1","8.2604.0-1","8.2604.0-2","8.2604.0-3","8.2604.0-4","8.2606.0-1","8.2606.0-2","8.2606.0-3","8.2606.0-4","8.2608.0-1","8.2608.0-2","8.2608.0-3","8.2608.0-4"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78002.json"}},{"package":{"name":"rsyslog","ecosystem":"Debian:13","purl":"pkg:deb/debian/rsyslog?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.2504.0-1+deb13u2"}]}],"versions":["8.2504.0-1","8.2504.0-1+deb13u1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78002.json"}},{"package":{"name":"rsyslog","ecosystem":"Debian:14","purl":"pkg:deb/debian/rsyslog?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.2608.0-4"}]}],"versions":["8.2504.0-1","8.2506.0-1","8.2506.0-2","8.2506.0-3","8.2506.0-4","8.2506.0-6","8.2510.0-1","8.2510.0-2","8.2510.0-3","8.2510.0-4","8.2510.0-5","8.2512.0-1","8.2512.0-2","8.2512.0-3","8.2602.0-1","8.2604.0-1","8.2604.0-2","8.2604.0-3","8.2604.0-4","8.2606.0-1","8.2606.0-2","8.2606.0-3","8.2606.0-4","8.2608.0-1","8.2608.0-2","8.2608.0-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78002.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:N/A:H"}]}