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CVE-2018-12232 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.9 MEDIUMVector:CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14	CVE	PatchThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2948	CVE
https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14	CVE	PatchThird Party Advisory
https://lkml.org/lkml/2018/6/5/14	CVE	Third Party Advisory
https://patchwork.ozlabs.org/patch/926519/	CVE	PatchThird Party Advisory
https://usn.ubuntu.com/3752-1/	CVE
https://usn.ubuntu.com/3752-2/	CVE
https://usn.ubuntu.com/3752-3/	CVE
http://www.securityfocus.com/bid/104453	CVE	Third Party AdvisoryVDB Entry
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14	[email protected]	PatchThird Party Advisory
https://access.redhat.com/errata/RHSA-2018:2948	[email protected]
https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14	[email protected]	PatchThird Party Advisory
https://lkml.org/lkml/2018/6/5/14	[email protected]	Third Party Advisory
https://patchwork.ozlabs.org/patch/926519/	[email protected]	PatchThird Party Advisory
https://usn.ubuntu.com/3752-1/	[email protected]
https://usn.ubuntu.com/3752-2/	[email protected]
https://usn.ubuntu.com/3752-3/	[email protected]
http://www.securityfocus.com/bid/104453	[email protected]	Third Party AdvisoryVDB Entry

see all 18 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-362	Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')	[email protected]

Affected Products

Product	Versions
linux linux kernel	<= 4.17.1
CPE cpe:2.3:o:linux:linux_kernel:::::::: Remediation No remediation found in references.

Change History

8 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Oct 31, 2018	CVE Modified	[email protected]
Aug 29, 2018	CVE Modified	[email protected]
Aug 24, 2018	CVE Modified	[email protected]
Aug 6, 2018	Initial Analysis	[email protected]
Jun 15, 2018	CVE Modified	[email protected]