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Amazon Linux AMI: CVE-2018-12232: Security patch for kernel (ALAS-2018-1044)

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Amazon Linux AMI: CVE-2018-12232: Security patch for kernel (ALAS-2018-1044)

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:C)
Published
06/12/2018
Created
07/25/2018
Added
06/29/2018
Modified
10/14/2022

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)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2018-1044
  • USN-3752-1
  • USN-3752-2
  • USN-3752-3
  • CVE-2018-12232

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