{"id":"DEBIAN-CVE-2026-5123","details":"A weakness has been identified in osrg GoBGP up to 4.3.0. This impacts the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go. Executing a manipulation of the argument data[1] can lead to off-by-one. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is said to be difficult. This patch is called 67c059413470df64bc20801c46f64058e88f800f. A patch should be applied to remediate this issue.","modified":"2026-09-14T17:00:27.580762827Z","published":"2026-03-30T16:16:10.123Z","upstream":["CVE-2026-5123"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-5123"}],"affected":[{"package":{"name":"gobgp","ecosystem":"Debian:12","purl":"pkg:deb/debian/gobgp?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.10.0-1","3.16.0-1","3.19.0-1","3.21.0-1","3.23.0-1","3.25.0-1","3.27.0-1","3.28.0-1","3.29.0-1","3.30.0-1","3.31.0-1","3.32.0-1","3.33.0-1","3.35.0-1","3.36.0-1","3.36.0-2","4.3.0-1","4.4.0-1","4.5.0-1","4.5.0-1~bpo13+1","4.6.0-1","4.6.0-2","4.6.0-2~bpo13+1","4.7.0-1","4.7.0-1~bpo13+1","4.8.0-1","4.8.0-2~exp1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5123.json"}},{"package":{"name":"gobgp","ecosystem":"Debian:13","purl":"pkg:deb/debian/gobgp?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.36.0-2","4.3.0-1","4.4.0-1","4.5.0-1","4.5.0-1~bpo13+1","4.6.0-1","4.6.0-2","4.6.0-2~bpo13+1","4.7.0-1","4.7.0-1~bpo13+1","4.8.0-1","4.8.0-2~exp1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5123.json"}},{"package":{"name":"gobgp","ecosystem":"Debian:14","purl":"pkg:deb/debian/gobgp?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-1"}]}],"versions":["3.36.0-2","4.3.0-1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5123.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}