CVEvulnerability

CVE-2018-12232

5.9 MEDIUM Published 2018-06-12 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-06-12
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
5.9 MEDIUM — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
7.1 HIGH — AV:N/AC:M/Au:N/C:N/I:N/A:C
Weaknesses
CWE-362

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.

Affected configurations

• linux linux kernel (<= 4.17.1)

Related

Weakness · CWE (1)

  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness

References