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Ubuntu: (Multiple Advisories) (CVE-2018-12232): Linux kernel (Azure, GCP, OEM) vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2018-12232): Linux kernel (Azure, GCP, OEM) vulnerabilities

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:C)
Published
06/12/2018
Created
03/19/2019
Added
08/31/2018
Modified
08/25/2021

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)

  • ubuntu-upgrade-linux-image-4-15-0-1017-oem
  • ubuntu-upgrade-linux-image-4-15-0-1018-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1020-aws
  • ubuntu-upgrade-linux-image-4-15-0-1020-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1021-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1022-azure
  • ubuntu-upgrade-linux-image-4-15-0-33-generic
  • ubuntu-upgrade-linux-image-4-15-0-33-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-33-lowlatency
  • ubuntu-upgrade-linux-image-4-15-0-33-snapdragon
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-edge
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-16-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon

References

  • USN-3676-1
  • USN-3676-2
  • USN-3696-1
  • USN-3696-2
  • USN-3752-1
  • USN-3752-2
  • USN-3752-3
  • USN-3753-1
  • USN-3753-2
  • USN-3754-1
  • USN-3910-1
  • USN-3910-2
  • USN-4486-1
  • CVE-2018-12232
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