high
8.1
CWE
362 416
Advisory Published
CVE Published
Updated

CVE-2019-6974: Race Condition

First published: Sat Feb 02 2019(Updated: )

A use after free issue was found in the way Linux kernel's KVM hypervisor implements its device control API. While creating a device via kvm_ioctl_create_device(), device holds a reference to a VM object, latter this reference is transferred to caller's file descriptor table. If such file descriptor was to be closed, reference count to the VM object could become zero, potentially leading to use-after-free issue latter. A user/process could use this flaw to crash the guest VM resulting in DoS issue OR potentially gain privileged access to a system. Upstream patch: --------------- -&gt; <a href="https://git.kernel.org/linus/cfa39381173d5f969daf43582c95ad679189cbc9">https://git.kernel.org/linus/cfa39381173d5f969daf43582c95ad679189cbc9</a> Reference: ---------- -&gt; <a href="https://www.openwall.com/lists/oss-security/2019/02/18/2">https://www.openwall.com/lists/oss-security/2019/02/18/2</a>

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel>=3.10<3.16.64
Linux Linux kernel>=3.17<3.18.136
Linux Linux kernel>=3.19<4.4.176
Linux Linux kernel>=4.5<4.9.156
Linux Linux kernel>=4.10<4.14.99
Linux Linux kernel>=4.15<4.19.21
Linux Linux kernel>=4.20<4.20.8
Debian Debian Linux=8.0
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=18.10
F5 BIG-IP Access Policy Manager>=13.0.0<=13.1.1
F5 BIG-IP Access Policy Manager>=14.0.0<=14.1.0
F5 BIG-IP Access Policy Manager>=15.0.0<15.1.0
F5 BIG-IP Advanced Firewall Manager>=13.0.0<=13.1.1
F5 BIG-IP Advanced Firewall Manager>=14.0.0<=14.1.0
F5 BIG-IP Advanced Firewall Manager>=15.0.0<15.1.0
F5 BIG-IP Analytics>=13.0.0<=13.1.1
F5 BIG-IP Analytics>=14.0.0<=14.1.0
F5 BIG-IP Analytics>=15.0.0<15.1.0
F5 Big-ip Application Acceleration Manager>=13.0.0<=13.1.1
F5 Big-ip Application Acceleration Manager>=14.0.0<=14.1.0
F5 Big-ip Application Acceleration Manager>=15.0.0<15.1.0
F5 BIG-IP Application Security Manager>=13.0.0<=13.1.1
F5 BIG-IP Application Security Manager>=14.0.0<=14.1.0
F5 BIG-IP Application Security Manager>=15.0.0<15.1.0
F5 Big-ip Edge Gateway>=13.0.0<=13.1.1
F5 Big-ip Edge Gateway>=14.0.0<=14.1.0
F5 Big-ip Edge Gateway>=15.0.0<15.1.0
F5 Big-ip Fraud Protection Service>=13.0.0<=13.1.1
F5 Big-ip Fraud Protection Service>=14.0.0<=14.1.0
F5 Big-ip Fraud Protection Service>=15.0.0<15.1.0
F5 Big-ip Global Traffic Manager>=13.0.0<=13.1.1
F5 Big-ip Global Traffic Manager>=14.0.0<=14.1.0
F5 Big-ip Global Traffic Manager>=15.0.0<15.1.0
F5 Big-ip Link Controller>=13.0.0<=13.1.1
F5 Big-ip Link Controller>=14.0.0<=14.1.0
F5 Big-ip Link Controller>=15.0.0<15.1.0
F5 Big-ip Local Traffic Manager>=13.0.0<=13.1.1
F5 Big-ip Local Traffic Manager>=14.0.0<=14.1.0
F5 Big-ip Local Traffic Manager>=15.0.0<15.1.0
F5 Big-ip Policy Enforcement Manager>=13.0.0<=13.1.1
F5 Big-ip Policy Enforcement Manager>=14.0.0<=14.1.0
F5 Big-ip Policy Enforcement Manager>=15.0.0<15.1.0
F5 Big-ip Webaccelerator>=13.0.0<=13.1.1
F5 Big-ip Webaccelerator>=14.0.0<=14.1.0
F5 Big-ip Webaccelerator>=15.0.0<15.1.0
Redhat Openshift Container Platform=3.11
Redhat Enterprise Linux=7.0
Redhat Enterprise Linux Desktop=7.0
Redhat Enterprise Linux Eus=7.5
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Server Aus=7.4
Redhat Enterprise Linux Server Aus=7.6
Redhat Enterprise Linux Server Eus=7.6
Redhat Enterprise Linux Server Tus=7.4
Redhat Enterprise Linux Server Tus=7.6
Redhat Enterprise Linux Workstation=7.0
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.119-1
6.11.10-1
6.12.5-1

Remedy

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cfa39381173d5f969daf43582c95ad679189cbc9

Remedy

https://bugs.chromium.org/p/project-zero/issues/detail?id=1765

Remedy

https://github.com/torvalds/linux/commit/cfa39381173d5f969daf43582c95ad679189cbc9

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