Date: Tue, 21 Apr 2020 17:18:53 +0530 From: Rohit Keshri <rkeshri@...hat.com> To: oss-security@...ts.openwall.com Subject: CVE-2020-10690 kernel: use-after-free in cdev_put() when a PTP device is removed while it's chardev is open Hello Team, Red Hats kernel has a flaw in Precision Time Protocol (PTP), which can cause a kernel panic with 'general protection fault' with below details. A use-after-free flaw was found in Linux Kernels implementation of __fput. 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 (potential privilege escalation) by the user with administrator privilege, it can cause a denial of service (DoS) problem 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. 'CVE-2020-10690' was assigned by Red Hat Inc. Upstream fix: https://firstname.lastname@example.org/T/#u Thank You .. Rohit Keshri / Red Hat Product Security Team 01BC 858A 07B7 15C8 EF33 BFE2 2EEB 0CBC 84A4 4C2D
Powered by blists - more mailing lists
Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.