CVE-2019-6974

high-risk
Published 2019-02-15

In the Linux kernel before 4.20.8, kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandles reference counting because of a race condition, leading to a use-after-free.

Do I need to act?

~
7.9% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
!
1 public exploit available
46388
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.1/10 High
NETWORK / HIGH complexity

Affected Products (20)

Affected Vendors

Debian Redhat Linux F5 Canonical

References (56)

Mailing List http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cfa393...
Broken Link http://www.securityfocus.com/bid/107127
Third 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-2019:2809
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:3967
Third Party Advisory https://access.redhat.com/errata/RHSA-2020:0103
Exploit https://bugs.chromium.org/p/project-zero/issues/detail?id=1765
Mailing List https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.99
Mailing List https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.21
Mailing List https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.8
Mailing List https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.156
Exploit https://github.com/torvalds/linux/commit/cfa39381173d5f969daf43582c95ad679189cbc...
Mailing List https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
Mailing List https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
Mailing List https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html
Third Party Advisory https://support.f5.com/csp/article/K11186236
https://support.f5.com/csp/article/K11186236?utm_source=f5support&amp%3Butm_medi...
Third Party Advisory https://usn.ubuntu.com/3930-1/
and 36 more references
63
/ 100
high-risk
Severity 24/34 · High
Exploitability 17/34 · Moderate
Exposure 22/34 · High