{"id":"USN-8172-1","summary":"kvmtool vulnerabilities","details":"It was discovered that kvmtool did not properly manage memory under certain\ncircumstances. A malicious guest attacker could use this issue to cause\nkvmtool to crash, leading to a denial of service, or possibly execute\narbitrary code on the host system. (CVE-2021-45464)\n\nIt was discovered that kvmtool incorrectly handled the 9p passthrough file\nsystem. A malicious guest attacker could possibly use this issue to open\nspecial files, escape the exported 9p tree, and execute arbitrary code on\nthe host system. (CVE-2023-2861)","modified":"2026-05-20T16:04:00.696628702Z","published":"2026-04-13T18:27:37Z","related":["UBUNTU-CVE-2021-45464","UBUNTU-CVE-2023-2861"],"upstream":["UBUNTU-CVE-2021-45464","UBUNTU-CVE-2023-2861"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8172-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-45464"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-2861"}],"affected":[{"package":{"name":"kvmtool","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/kvmtool?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.20151104-1ubuntu0.1~esm1"}]}],"versions":["0.20150908-1","0.20151104-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"kvmtool","binary_version":"0.20151104-1ubuntu0.1~esm1"}]},"database_specific":{"cves_map":{"cves":[],"ecosystem":"Ubuntu:Pro:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8172-1.json"}},{"package":{"name":"kvmtool","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/kvmtool?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.20170904-1ubuntu0.18.04.1~esm1"}]}],"versions":["0.20161128-1","0.20170904-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"kvmtool","binary_version":"0.20170904-1ubuntu0.18.04.1~esm1"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2021-45464","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}]},{"id":"CVE-2023-2861","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"low"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8172-1.json"}},{"package":{"name":"kvmtool","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/kvmtool?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.20170904-1ubuntu0.20.04.1~esm1"}]}],"versions":["0.20170904-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"kvmtool","binary_version":"0.20170904-1ubuntu0.20.04.1~esm1"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2021-45464","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}]},{"id":"CVE-2023-2861","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"low"}]}],"ecosystem":"Ubuntu:Pro:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8172-1.json"}},{"package":{"name":"kvmtool","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/kvmtool?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.20170904-1.1ubuntu0.1~esm2"}]}],"versions":["0.20170904-1.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"kvmtool","binary_version":"0.20170904-1.1ubuntu0.1~esm2"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2021-45464","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}]},{"id":"CVE-2023-2861","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"low"}]}],"ecosystem":"Ubuntu:Pro:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8172-1.json"}}],"schema_version":"1.7.5"}