Race Condition Affecting kernel-uek-debug package, versions <0:4.1.12-124.26.1.el6uek


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.69% (80th percentile)

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  • Snyk IDSNYK-ORACLE6-KERNELUEKDEBUG-2543033
  • published10 Apr 2022
  • disclosed22 Oct 2018

Introduced: 22 Oct 2018

CVE-2018-18559  (opens in a new tab)
CWE-362  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Oracle:6 kernel-uek-debug to version 0:4.1.12-124.26.1.el6uek or higher.
This issue was patched in ELSA-2019-4575.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-debug package and not the kernel-uek-debug package as distributed by Oracle. See How to fix? for Oracle:6 relevant fixed versions and status.

In the Linux kernel through 4.19, a use-after-free can occur due to a race condition between fanout_add from setsockopt and bind on an AF_PACKET socket. This issue exists because of the 15fe076edea787807a7cdc168df832544b58eba6 incomplete fix for a race condition. The code mishandles a certain multithreaded case involving a packet_do_bind unregister action followed by a packet_notifier register action. Later, packet_release operates on only one of the two applicable linked lists. The attacker can achieve Program Counter control.

CVSS Scores

version 3.1