Use After Free Affecting kernel-devel-azure package, versions <4.12.14-8.33.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-SLES151-KERNELDEVELAZURE-2710819
  • published14 Apr 2022
  • disclosed10 Jun 2020

Introduced: 10 Jun 2020

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

How to fix?

Upgrade SLES:15.1 kernel-devel-azure to version 4.12.14-8.33.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-devel-azure package and not the kernel-devel-azure package as distributed by SLES. See How to fix? for SLES:15.1 relevant fixed versions and status.

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.

CVSS Scores

version 3.1