Use After Free Affecting kernel-rt-debug-kvm package, versions <0:3.10.0-957.12.1.rt56.927.el7
Threat Intelligence
EPSS
3.67% (92nd
percentile)
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELRTDEBUGKVM-2134286
- published 26 Jul 2021
- disclosed 7 Feb 2019
Introduced: 7 Feb 2019
CVE-2019-6974 Open this link in a new tabHow to fix?
Upgrade Centos:7 kernel-rt-debug-kvm to version 0:3.10.0-957.12.1.rt56.927.el7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-kvm package and not the kernel-rt-debug-kvm package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
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.
References
- http://www.securityfocus.com/bid/107127
- https://support.f5.com/csp/article/K11186236
- https://support.f5.com/csp/article/K11186236?utm_source=f5support&utm_medium=RSS
- https://access.redhat.com/security/cve/CVE-2019-6974
- https://www.exploit-db.com/exploits/46388/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cfa39381173d5f969daf43582c95ad679189cbc9
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1765
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.99
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.21
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.8
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.156
- https://github.com/torvalds/linux/commit/cfa39381173d5f969daf43582c95ad679189cbc9
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
- https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html
- https://access.redhat.com/errata/RHBA-2019:0959
- https://access.redhat.com/errata/RHSA-2019:0833
- https://usn.ubuntu.com/3930-1/
- https://usn.ubuntu.com/3930-2/
- https://usn.ubuntu.com/3931-1/
- https://usn.ubuntu.com/3931-2/
- https://usn.ubuntu.com/3932-1/
- https://usn.ubuntu.com/3932-2/
- https://usn.ubuntu.com/3933-1/
- https://usn.ubuntu.com/3933-2/
- https://support.f5.com/csp/article/K11186236?utm_source=f5support&%3Butm_medium=RSS
CVSS Scores
version 3.1