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Use After Free The advisory has been revoked - it doesn't affect any version of package kernel-syms-rt  (opens in a new tab)

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EPSS
0.36% (28th percentile)

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  • Snyk IDSNYK-SLES151-KERNELSYMSRT-2705137
  • published14 Apr 2022
  • disclosed4 Sept 2020
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Introduced: 4 Sep 2020

CVE-2020-10690  (opens in a new tab)
CWE-416  (opens in a new tab)

Amendment

The SLES security team deemed this advisory irrelevant for SLES:15.1.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-syms-rt package and not the kernel-syms-rt package as distributed by SLES.

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.

References