{"id":"DEBIAN-CVE-2026-121995","details":"A stack buffer overflow in the GDB client's tracepoint upload handler allows an attacker-controlled debug stub to corrupt stack memory automatically during connection setup. The overflow results from GDB reading beyond the current reply boundary into a stale prior reply in the shared packet buffer.","modified":"2026-11-06T15:03:00.673496382Z","published":"2026-11-05T17:18:00.690Z","upstream":["CVE-2026-121995"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-121995"}],"affected":[{"package":{"name":"gdb","ecosystem":"Debian:12","purl":"pkg:deb/debian/gdb?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["13.1-3","13.2-1","13.2-1+hurd.3","15.1-1","15.2-1","15.2-2~exp1","16.0.90.20250111-1~exp1","16.0.90.20250111-1~exp2","16.1-1","16.1-2","16.1-2+hurd.1","16.2-1","16.2-2","16.2-3","16.2-4","16.2-5","16.2-6","16.2-7","16.2-8","16.3-1","16.3-2","16.3-3","16.3-4","16.3-4~bpo13+1","16.3-4~bpo13+2","16.3-5","16.3-5~bpo13+1","17.0.50.20250905-1~exp1","17.0.90-1~exp1","17.0.90-1~exp2","17.1-1","17.1-1~bpo13+1","17.1-2","17.1-3","17.1-4","17.2-1","17.2-1~bpo13+1","18.1-1","18.1-2","18.1-3","18.1-3~bpo13+1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121995.json"}},{"package":{"name":"gdb","ecosystem":"Debian:13","purl":"pkg:deb/debian/gdb?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["16.3-1","16.3-2","16.3-3","16.3-4","16.3-4~bpo13+1","16.3-4~bpo13+2","16.3-5","16.3-5~bpo13+1","17.0.50.20250905-1~exp1","17.0.90-1~exp1","17.0.90-1~exp2","17.1-1","17.1-1~bpo13+1","17.1-2","17.1-3","17.1-4","17.2-1","17.2-1~bpo13+1","18.1-1","18.1-2","18.1-3","18.1-3~bpo13+1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121995.json"}},{"package":{"name":"gdb","ecosystem":"Debian:14","purl":"pkg:deb/debian/gdb?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["16.3-1","16.3-2","16.3-3","16.3-4","16.3-4~bpo13+1","16.3-4~bpo13+2","16.3-5","16.3-5~bpo13+1","17.0.50.20250905-1~exp1","17.0.90-1~exp1","17.0.90-1~exp2","17.1-1","17.1-1~bpo13+1","17.1-2","17.1-3","17.1-4","17.2-1","17.2-1~bpo13+1","18.1-1","18.1-2","18.1-3","18.1-3~bpo13+1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-121995.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}