CVE-2020-10690

2020-05-0813:48:30

CWE-416

redhat

www.cve.org

CVSS3

6.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

AI Score

6.7

Confidence

High

EPSS

Percentile

14.2%

JSON

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.

CNA Affected

[
  {
    "product": "kernel",
    "vendor": "Red Hat",
    "versions": [
      {
        "status": "affected",
        "version": "all kernel versions before 5.5"
      }
    ]
  }
]