CVE-2018-12232

Linux Kernel vulnerability

CVSS

5.9

EPSS

6.6%

EPSS pct

93th

Exploited

No known

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.

Affected vendor

Linux

Affected product

Linux Kernel

CVSS vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness type (CWE)

CWE-362 — Race Condition

Published

2018-06-12

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 6.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2018-12232

Confirm whether Linux Linux Kernel is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2018-12232.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-12232

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