CVE-2018-12232

MEDIUM

Linux kernel <4.17.1 - Use After Free

Title source: llm
STIX 2.1

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.

References (9)

Core 9
Core References
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3752-2/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3752-3/
Patch, Third Party Advisory x_refsource_misc
https://patchwork.ozlabs.org/patch/926519/
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:2948
Third Party Advisory x_refsource_misc
https://lkml.org/lkml/2018/6/5/14
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/104453
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3752-1/

Scores

CVSS v3 5.9
EPSS 0.0332
EPSS Percentile 87.3%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-362
Status published
Products (1)
linux/linux_kernel < 4.17.1
Published Jun 12, 2018
Tracked Since Feb 18, 2026