{"id":"USN-8550-1","summary":"libslirp vulnerability","details":"It was discovered that libslirp incorrectly handled TCP urgent data. A\nprivileged attacker inside a guest VM could possibly use this issue to\nobtain sensitive information from the host process memory.","modified":"2026-07-15T20:00:54.833333215Z","published":"2026-07-15T13:59:22Z","related":["UBUNTU-CVE-2026-9539"],"upstream":["CVE-2026-9539","UBUNTU-CVE-2026-9539"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8550-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-9539"}],"affected":[{"package":{"name":"libslirp","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libslirp?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.6.1-1ubuntu0.2"}]}],"versions":["4.4.0-1build1","4.6.1-1","4.6.1-1build1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libslirp0","binary_version":"4.6.1-1ubuntu0.2"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-9539"}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8550-1.json"}},{"package":{"name":"libslirp","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libslirp?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.7.0-1ubuntu3.1"}]}],"versions":["4.7.0-1ubuntu1","4.7.0-1ubuntu2","4.7.0-1ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_version":"4.7.0-1ubuntu3.1","binary_name":"libslirp0"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-9539"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8550-1.json"}},{"package":{"name":"libslirp","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libslirp?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.9.1-1ubuntu1.1"}]}],"versions":["4.8.0-1ubuntu1","4.9.1-1ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"4.9.1-1ubuntu1.1","binary_name":"libslirp0"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-9539"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8550-1.json"}}],"schema_version":"1.7.5"}