medium6.5

CVE-2020-10690

There is a use-after-free in kernel versions before 5.5 due to a race condition between the release of ptp_clock and cdev while resource deallocation.

Impact

There is a use-after-free in kernel versions before 5.5 due to a race condition between the release of ptp_clock and cdev while resource deallocation. When a (high privileged) process allocates a ptp device file (like /dev/ptpX) and voluntarily goes to sleep. During this time if the underlying device is removed, it can cause an exploitable condition as the process wakes up to terminate and clean all attached files. The system crashes due to the cdev structure being invalid (as already freed) which is pointed to by the inode.

Affected products

Vendor	Product	Affected versions
Linux	Linux Kernel	before 5.5
Redhat	Enterprise Linux	Versions 7.0, 8.0
Debian	Debian Linux	Version 8.0
Canonical	Ubuntu Linux	Versions 14.04, 16.04
Opensuse	Leap	Version 15.1
Netapp	Active Iq Unified Manager	All versions
Netapp	Element Software	All versions
Netapp	Hci Management Node	All versions
Netapp	Solidfire	All versions
Netapp	Steelstore Cloud Integrated Storage	All versions
Netapp	Hci Compute Node	All versions
Netapp	H300s Firmware	All versions

Weakness classification

CWE-416

Impact

Affected products

Weakness classification

References