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CVE-2019-7221

20
FAUCET Score

CVE-2019-7221 is a Use-after-Free vulnerability in the KVM implementation of the Linux kernel, affecting various distributions including Canonical, Debian, Fedora, and Red Hat. With a CVSS score of 7.8 (High), it allows a local attacker to achieve high impact on confidentiality, integrity, and availability with low attack complexity. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.20.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
15.0CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
28CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*
29CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.80%
Probability of exploitation in next 30 days
EPSS Percentile
53.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0080 is in the 89th percentile among its peer group of 16,994 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-957.12.1.rt56.927.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-957.12.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.4 Advanced Update SupportFixed in: kernel-0:3.10.0-693.61.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.4 Telco Extended Update SupportFixed in: kernel-0:3.10.0-693.61.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.4 Update Services for SAP SolutionsFixed in: kernel-0:3.10.0-693.61.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.5 Extended Update SupportFixed in: kernel-0:3.10.0-862.44.2.el7
View patch

Vendor Advisories (1)

redhatCVE-2019-7221Important

Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer

Feb 7, 2019

References

lists.opensuse.org / opensuse-security-announce/2019-02/msg00042.html
Mailing ListThird Party Advisory
packetstormsecurity.com / files/151713/KVM-VMX-Preemption-Timer-Use-After-Free.html
Third Party AdvisoryVDB Entry
access.redhat.com / errata/RHBA-2019:0959
Third Party Advisory
access.redhat.com / errata/RHSA-2019:0818
Third Party Advisory
access.redhat.com / errata/RHSA-2019:0833
Third Party Advisory
access.redhat.com / errata/RHSA-2019:3967
access.redhat.com / errata/RHSA-2019:4058
bugs.chromium.org / p/project-zero/issues/detail
ExploitPatchThird Party Advisory
github.com / torvalds/linux/commits/master/arch/x86/kvm
Third Party Advisory
git.kernel.org / pub/scm/linux/kernel/git/torvalds/linux.git/commit
Mailing ListPatchVendor Advisory
lists.debian.org / debian-lts-announce/2019/03/msg00034.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2019/04/msg00004.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2019/05/msg00002.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/KDOXCX3QFVWYXH5CQMGDDE7H6MUG5XGG
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/Y2HMABEMJDPA6LPCBE5WIEZXUKY7DLTN
security.netapp.com / advisory/ntap-20190404-0002
Third Party Advisory
support.f5.com / csp/article/K08413011
usn.ubuntu.com / 3930-1
Third Party Advisory
usn.ubuntu.com / 3930-2
Third Party Advisory
usn.ubuntu.com / 3931-1
Third Party Advisory
usn.ubuntu.com / 3931-2
Third Party Advisory
usn.ubuntu.com / 3932-1
Third Party Advisory
usn.ubuntu.com / 3932-2
Third Party Advisory
openwall.com / lists/oss-security/2019/02/18/2
Mailing ListPatchThird Party Advisory