{"id":"UBUNTU-CVE-2021-4158","details":"A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.","modified":"2026-01-30T01:47:49.590727Z","published":"2021-12-24T00:00:00Z","related":["USN-5307-1"],"upstream":["CVE-2021-4158"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-4158"},{"type":"REPORT","url":"https://lists.nongnu.org/archive/html/qemu-devel/2021-12/msg03692.html"},{"type":"REPORT","url":"https://www.mail-archive.com/qemu-devel@nongnu.org/msg857944.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5307-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-4158"}],"affected":[{"package":{"name":"qemu","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/qemu@1:6.2+dfsg-2ubuntu5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.2+dfsg-2ubuntu5"}]}],"versions":["1:6.0+dfsg-2expubuntu1","1:6.0+dfsg-2expubuntu2","1:6.0+dfsg-2expubuntu4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"qemu","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-block-extra","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-guest-agent","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-arm","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-common","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-data","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-gui","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-mips","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-misc","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-ppc","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-s390x","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-sparc","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-x86","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-x86-microvm","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-system-x86-xen","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-user","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_name":"qemu-user-binfmt","binary_version":"1:6.2+dfsg-2ubuntu5"},{"binary_version":"1:6.2+dfsg-2ubuntu5","binary_name":"qemu-user-static"},{"binary_name":"qemu-utils","binary_version":"1:6.2+dfsg-2ubuntu5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4158.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}