CVE Vulnerability

CVE-2018-12232

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.

7.1 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 6.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

Scope

5.9 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://patchwork.ozlabs.org/patch/926519/ Patch Third Party Advisory
https://lkml.org/lkml/2018/6/5/14 Third Party Advisory
https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14 Patch Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14 Patch Third Party Advisory
http://www.securityfocus.com/bid/104453 Third Party Advisory VDB Entry
https://usn.ubuntu.com/3752-2/
https://usn.ubuntu.com/3752-1/
https://usn.ubuntu.com/3752-3/
https://access.redhat.com/errata/RHSA-2018:2948
Configurations

Configuration 1

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Information

Published : 2018-06-12 12:29

Updated : 2018-10-31 10:30

NVD link : CVE-2018-12232

Mitre link : CVE-2018-12232

Products Affected
No products.
CWE
CWE-362