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CentOS Linux: CVE-2018-12232: Important: kernel-alt security, bug fix, and enhancement update (CESA-2018:2948)

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CentOS Linux: CVE-2018-12232: Important: kernel-alt security, bug fix, and enhancement update (CESA-2018:2948)

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:C)
Published
06/12/2018
Created
08/29/2019
Added
08/28/2019
Modified
05/25/2023

Description

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.

Solution(s)

  • centos-upgrade-kernel

References

  • 104453
  • CVE-2018-12232
  • RHSA-2018:2948

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