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Vulnerability record · CVE-2019-7221 · published 21 March 2019

CVE-2019-7221: Linux kernel use after free vulnerability

Linux · Linux Kernel

The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.

7.8 CVSS 3.0 High EPSS 0.80% · top 45.0% CWE-416 · Use after free
7.8CVSS 3.0 base score, v2 4.6
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
15Affected product versions listed by NVD
48References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

15 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.html Mailing ListThird Party Advisory
http://packetstormsecurity.com/files/151713/KVM-VMX-Preemption-Timer-Use-After-Free.html Third Party AdvisoryVDB Entry
http://www.openwall.com/lists/oss-security/2019/02/18/2 Mailing ListPatchThird Party Advisory
https://access.redhat.com/errata/RHBA-2019:0959 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0818 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0833 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3967
https://access.redhat.com/errata/RHSA-2019:4058
https://bugs.chromium.org/p/project-zero/issues/detail?id=1760 ExploitPatchThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ecec76885bcfe3294685dc363fd1273df0d5d65f Mailing ListPatchVendor Advisory
https://github.com/torvalds/linux/commits/master/arch/x86/kvm Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KDOXCX3QFVWYXH5CQMGDDE7
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y2HMABEMJDPA6LPCBE5WIEZ
https://security.netapp.com/advisory/ntap-20190404-0002/ Third Party Advisory
https://support.f5.com/csp/article/K08413011
https://usn.ubuntu.com/3930-1/ Third Party Advisory
https://usn.ubuntu.com/3930-2/ Third Party Advisory
https://usn.ubuntu.com/3931-1/ Third Party Advisory
https://usn.ubuntu.com/3931-2/ Third Party Advisory
https://usn.ubuntu.com/3932-1/ Third Party Advisory
https://usn.ubuntu.com/3932-2/ Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.html Mailing ListThird Party Advisory
http://packetstormsecurity.com/files/151713/KVM-VMX-Preemption-Timer-Use-After-Free.html Third Party AdvisoryVDB Entry
http://www.openwall.com/lists/oss-security/2019/02/18/2 Mailing ListPatchThird Party Advisory
https://access.redhat.com/errata/RHBA-2019:0959 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0818 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0833 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3967
https://access.redhat.com/errata/RHSA-2019:4058
https://bugs.chromium.org/p/project-zero/issues/detail?id=1760 ExploitPatchThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ecec76885bcfe3294685dc363fd1273df0d5d65f Mailing ListPatchVendor Advisory
https://github.com/torvalds/linux/commits/master/arch/x86/kvm Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KDOXCX3QFVWYXH5CQMGDDE7
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y2HMABEMJDPA6LPCBE5WIEZ

Track CVE-2019-7221 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

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Source: NIST National Vulnerability Database (record CVE-2019-7221), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.