CVE-2018-12232

kernel: NULL pointer dereference if close and fchownat system calls share a socket file descriptor

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.0

Review impact separately from score.

Published · June 4, 2018

Updated · June 28, 2026

Description

A NULL pointer dereference issue was found in the Linux kernel. If the close() and fchownat() system calls share a socket file descriptor as an argument, then the two calls can race and trigger a NULL pointer dereference leading to a system crash and a denial of service.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 5.5
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference