{"id":"DEBIAN-CVE-2026-120830","details":"A flaw was found in libslirp in icmp_forward_error(). When building an ICMP error response, the length of the quoted original IPv4 packet was taken from the IP header without clamping it to the actual buffer length. A truncated or malformed packet could cause an out-of-bounds heap read, leaking host memory into the ICMP error packet returned to a guest or container.","modified":"2026-11-03T13:00:07.646761608Z","published":"2026-11-03T00:17:18.947Z","upstream":["CVE-2026-120830"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-120830"}],"affected":[{"package":{"name":"libslirp","ecosystem":"Debian:12","purl":"pkg:deb/debian/libslirp?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.7.0-1","4.8.0-1","4.9.1-1","4.9.2-1","4.9.3-1","4.9.4-1","4.9.5-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-120830.json"}},{"package":{"name":"libslirp","ecosystem":"Debian:13","purl":"pkg:deb/debian/libslirp?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.0-1","4.8.0-1+deb13u1","4.9.1-1","4.9.2-1","4.9.3-1","4.9.4-1","4.9.5-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-120830.json"}},{"package":{"name":"libslirp","ecosystem":"Debian:14","purl":"pkg:deb/debian/libslirp?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.0-1","4.9.1-1","4.9.2-1","4.9.3-1","4.9.4-1","4.9.5-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-120830.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N"}]}