CVE-2018-12232

 

Published at: - 12-06-2018 02:29

Last modified: - 26-10-2022 01:44

Total changes: - 3

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.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://patchwork.ozlabs.org/patch/926519/
• https://lkml.org/lkml/2018/6/5/14
• https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14
• 104453-Third Party Advisory, VDB Entry
• USN-3752-2-
• USN-3752-1-
• USN-3752-3-
• RHSA-2018:2948-

 

Keywords

NVD

 

CVE-2018-12232

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures