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Race Condition Affecting kernel-default-man package, versions <4.12.14-25.28.1

Severity

 Recommended
high

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.88% (83rd percentile)

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  • Snyk IDSNYK-SLES150-KERNELDEFAULTMAN-2757342
  • published14 Apr 2022
  • disclosed1 Feb 2019
Report a new vulnerability Found a mistake?

Introduced: 1 Feb 2019

CVE-2018-12232  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade SLES:15.0 kernel-default-man to version 4.12.14-25.28.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-default-man package and not the kernel-default-man package as distributed by SLES. See How to fix? for SLES:15.0 relevant fixed versions and status.

In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat does not increment the file descriptor reference count, which allows close to set the socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash.