{"id":"DEBIAN-CVE-2026-5265","details":"When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.","modified":"2026-09-14T17:03:18.038106799Z","published":"2026-04-24T13:16:21.770Z","upstream":["CVE-2026-5265"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-5265"}],"affected":[{"package":{"name":"ovn","ecosystem":"Debian:12","purl":"pkg:deb/debian/ovn?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["23.03.0-1","23.03.0-2","23.03.0-3","23.03.1-1~deb12u1","23.03.1-1~deb12u2","23.09.0-1","23.09.0-2","24.03.0-1","24.03.0~git20240205.ebb7076-1","24.03.1-1","24.03.1-2","24.03.2-1","24.03.2-2","24.09.0-1","25.03.0-1","25.03.0~git20250216.7c69af7-1","25.03.0~git20250216.7c69af7-2","25.09.0-1","25.09.0-2","25.09.0-3","26.03.0-1","26.03.0-2","26.03.0-3","26.03.0-4","26.03.0-5","26.03.0-6","26.03.0~git20260216.b543a88-1","26.03.0~git20260216.b543a88-2","26.03.0~git20260216.b543a88-3","26.03.0~git20260216.b543a88-4","26.03.1-1","26.03.2-1","26.09.0~git20260819.c60a7af-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5265.json"}},{"package":{"name":"ovn","ecosystem":"Debian:13","purl":"pkg:deb/debian/ovn?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["25.03.0-1","25.09.0-1","25.09.0-2","25.09.0-3","26.03.0-1","26.03.0-2","26.03.0-3","26.03.0-4","26.03.0-5","26.03.0-6","26.03.0~git20260216.b543a88-1","26.03.0~git20260216.b543a88-2","26.03.0~git20260216.b543a88-3","26.03.0~git20260216.b543a88-4","26.03.1-1","26.03.2-1","26.09.0~git20260819.c60a7af-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5265.json"}},{"package":{"name":"ovn","ecosystem":"Debian:14","purl":"pkg:deb/debian/ovn?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"26.03.0-4"}]}],"versions":["25.03.0-1","25.09.0-1","25.09.0-2","25.09.0-3","26.03.0-1","26.03.0-2","26.03.0-3","26.03.0~git20260216.b543a88-1","26.03.0~git20260216.b543a88-2","26.03.0~git20260216.b543a88-3","26.03.0~git20260216.b543a88-4"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5265.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H"}]}