CVE-2019-6974 Information

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.

CVSS Vector

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

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cfa39381173d5f969daf43582c95ad679189cbc9 http://www.securityfocus.com/bid/107127 https://access.redhat.com/errata/RHBA-2019:0959 https://access.redhat.com/errata/RHSA-2019:0818 https://access.redhat.com/errata/RHSA-2019:0833 https://access.redhat.com/errata/RHSA-2019:2809 https://access.redhat.com/errata/RHSA-2019:3967 https://access.redhat.com/errata/RHSA-2020:0103 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://support.f5.com/csp/article/K11186236 https://support.f5.com/csp/article/K11186236?utm_source=f5support&utm_medium=RSS 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://www.exploit-db.com/exploits/46388/

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1