{"id":"UBUNTU-CVE-2021-3392","details":"A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.","modified":"2026-06-02T20:15:07.019106417Z","published":"2021-03-23T20:15:00Z","related":["USN-5010-1"],"upstream":["CVE-2021-3392"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3392"},{"type":"REPORT","url":"https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg00488.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5010-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-3392"}],"affected":[{"package":{"name":"qemu","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/qemu?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.11+dfsg-1ubuntu7.37"}]}],"versions":["1:2.10+dfsg-0ubuntu3","1:2.10+dfsg-0ubuntu4","1:2.10+dfsg-0ubuntu5","1:2.11+dfsg-1ubuntu1","1:2.11+dfsg-1ubuntu2","1:2.11+dfsg-1ubuntu4","1:2.11+dfsg-1ubuntu5","1:2.11+dfsg-1ubuntu6","1:2.11+dfsg-1ubuntu7","1:2.11+dfsg-1ubuntu7.1","1:2.11+dfsg-1ubuntu7.2","1:2.11+dfsg-1ubuntu7.3","1:2.11+dfsg-1ubuntu7.4","1:2.11+dfsg-1ubuntu7.5","1:2.11+dfsg-1ubuntu7.6","1:2.11+dfsg-1ubuntu7.7","1:2.11+dfsg-1ubuntu7.8","1:2.11+dfsg-1ubuntu7.9","1:2.11+dfsg-1ubuntu7.10","1:2.11+dfsg-1ubuntu7.12","1:2.11+dfsg-1ubuntu7.13","1:2.11+dfsg-1ubuntu7.14","1:2.11+dfsg-1ubuntu7.15","1:2.11+dfsg-1ubuntu7.17","1:2.11+dfsg-1ubuntu7.18","1:2.11+dfsg-1ubuntu7.19","1:2.11+dfsg-1ubuntu7.20","1:2.11+dfsg-1ubuntu7.21","1:2.11+dfsg-1ubuntu7.22","1:2.11+dfsg-1ubuntu7.23","1:2.11+dfsg-1ubuntu7.25","1:2.11+dfsg-1ubuntu7.26","1:2.11+dfsg-1ubuntu7.27","1:2.11+dfsg-1ubuntu7.28","1:2.11+dfsg-1ubuntu7.29","1:2.11+dfsg-1ubuntu7.31","1:2.11+dfsg-1ubuntu7.32","1:2.11+dfsg-1ubuntu7.33","1:2.11+dfsg-1ubuntu7.34","1:2.11+dfsg-1ubuntu7.35","1:2.11+dfsg-1ubuntu7.36"],"ecosystem_specific":{"binaries":[{"binary_name":"qemu","binary_version":"1:2.11+dfsg-1ubuntu7.37"},{"binary_version":"1:2.11+dfsg-1ubuntu7.37","binary_name":"qemu-block-extra"},{"binary_name":"qemu-guest-agent","binary_version":"1:2.11+dfsg-1ubuntu7.37"},{"binary_name":"qemu-kvm","binary_version":"1:2.11+dfsg-1ubuntu7.37"},{"binary_name":"qemu-system","binary_version":"1:2.11+dfsg-1ubuntu7.37"},{"binary_version":"1:2.11+dfsg-1ubuntu7.37","binary_name":"qemu-system-arm"},{"binary_version":"1:2.11+dfsg-1ubuntu7.37","binary_name":"qemu-system-common"},{"binary_name":"qemu-system-mips","binary_version":"1:2.11+dfsg-1ubuntu7.37"},{"binary_name":"qemu-system-misc","binary_version":"1:2.11+dfsg-1ubuntu7.37"},{"binary_version":"1:2.11+dfsg-1ubuntu7.37","binary_name":"qemu-system-ppc"},{"binary_name":"qemu-system-s390x","binary_version":"1:2.11+dfsg-1ubuntu7.37"},{"binary_name":"qemu-system-sparc","binary_version":"1:2.11+dfsg-1ubuntu7.37"},{"binary_version":"1:2.11+dfsg-1ubuntu7.37","binary_name":"qemu-system-x86"},{"binary_name":"qemu-user","binary_version":"1:2.11+dfsg-1ubuntu7.37"},{"binary_version":"1:2.11+dfsg-1ubuntu7.37","binary_name":"qemu-user-binfmt"},{"binary_name":"qemu-user-static","binary_version":"1:2.11+dfsg-1ubuntu7.37"},{"binary_version":"1:2.11+dfsg-1ubuntu7.37","binary_name":"qemu-utils"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3392.json"}},{"package":{"name":"qemu","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/qemu?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.2-3ubuntu6.17"}]}],"versions":["1:4.0+dfsg-0ubuntu9","1:4.0+dfsg-0ubuntu10","1:4.2-1ubuntu1","1:4.2-1ubuntu2","1:4.2-3ubuntu1","1:4.2-3ubuntu2","1:4.2-3ubuntu3","1:4.2-3ubuntu4","1:4.2-3ubuntu5","1:4.2-3ubuntu6","1:4.2-3ubuntu6.1","1:4.2-3ubuntu6.2","1:4.2-3ubuntu6.3","1:4.2-3ubuntu6.4","1:4.2-3ubuntu6.5","1:4.2-3ubuntu6.6","1:4.2-3ubuntu6.7","1:4.2-3ubuntu6.8","1:4.2-3ubuntu6.9","1:4.2-3ubuntu6.10","1:4.2-3ubuntu6.11","1:4.2-3ubuntu6.12","1:4.2-3ubuntu6.14","1:4.2-3ubuntu6.15","1:4.2-3ubuntu6.16"],"ecosystem_specific":{"binaries":[{"binary_name":"qemu","binary_version":"1:4.2-3ubuntu6.17"},{"binary_name":"qemu-block-extra","binary_version":"1:4.2-3ubuntu6.17"},{"binary_version":"1:4.2-3ubuntu6.17","binary_name":"qemu-guest-agent"},{"binary_name":"qemu-kvm","binary_version":"1:4.2-3ubuntu6.17"},{"binary_name":"qemu-system","binary_version":"1:4.2-3ubuntu6.17"},{"binary_name":"qemu-system-arm","binary_version":"1:4.2-3ubuntu6.17"},{"binary_name":"qemu-system-common","binary_version":"1:4.2-3ubuntu6.17"},{"binary_name":"qemu-system-data","binary_version":"1:4.2-3ubuntu6.17"},{"binary_version":"1:4.2-3ubuntu6.17","binary_name":"qemu-system-gui"},{"binary_name":"qemu-system-mips","binary_version":"1:4.2-3ubuntu6.17"},{"binary_version":"1:4.2-3ubuntu6.17","binary_name":"qemu-system-misc"},{"binary_version":"1:4.2-3ubuntu6.17","binary_name":"qemu-system-ppc"},{"binary_name":"qemu-system-s390x","binary_version":"1:4.2-3ubuntu6.17"},{"binary_version":"1:4.2-3ubuntu6.17","binary_name":"qemu-system-sparc"},{"binary_name":"qemu-system-x86","binary_version":"1:4.2-3ubuntu6.17"},{"binary_name":"qemu-system-x86-microvm","binary_version":"1:4.2-3ubuntu6.17"},{"binary_name":"qemu-system-x86-xen","binary_version":"1:4.2-3ubuntu6.17"},{"binary_name":"qemu-user","binary_version":"1:4.2-3ubuntu6.17"},{"binary_version":"1:4.2-3ubuntu6.17","binary_name":"qemu-user-binfmt"},{"binary_name":"qemu-user-static","binary_version":"1:4.2-3ubuntu6.17"},{"binary_version":"1:4.2-3ubuntu6.17","binary_name":"qemu-utils"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3392.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L"},{"type":"Ubuntu","score":"low"}]}