CVE-2019-6974

Public Exploit

Description

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.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 4.81% Top 15%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugs.chromium.org/p/project-zero/issues/detail?id=1765 mailing list patch exploit third party advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.99 mailing list vendor advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.21 mailing list vendor advisory
https://www.exploit-db.com/exploits/46388/ exploit vdb entry third party advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.8 mailing list vendor advisory
https://github.com/torvalds/linux/commit/cfa39381173d5f969daf43582c95ad679189cbc9 exploit third party advisory patch
http://www.securityfocus.com/bid/107127 vdb entry third party advisory broken link
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.156 mailing list vendor advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cfa39381173d5f969daf43582c95ad679189cbc9 mailing list patch vendor advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html third party advisory mailing list
https://usn.ubuntu.com/3932-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3932-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3930-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3931-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3933-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3931-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3930-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3933-1/ third party advisory vendor advisory
https://support.f5.com/csp/article/K11186236 third party advisory
https://access.redhat.com/errata/RHSA-2019:0833 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:0818 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html third party advisory mailing list
https://access.redhat.com/errata/RHBA-2019:0959 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:2809 third party advisory vendor advisory
https://support.f5.com/csp/article/K11186236?utm_source=f5support&%3Butm_medium=RSS
https://access.redhat.com/errata/RHSA-2019:3967 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2020:0103 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-6974?
CVE-2019-6974 has been scored as a high severity vulnerability.
How to fix CVE-2019-6974?
To fix CVE-2019-6974, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-6974 being actively exploited in the wild?
It is possible that CVE-2019-6974 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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