CVE-2018-12232 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.9 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14 Patch  Third Party Advisory 
http://www.securityfocus.com/bid/104453 Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2018:2948
https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14 Patch  Third Party Advisory 
https://lkml.org/lkml/2018/6/5/14 Third Party Advisory 
https://patchwork.ozlabs.org/patch/926519/ Patch  Third Party Advisory 
https://usn.ubuntu.com/3752-1/
https://usn.ubuntu.com/3752-2/
https://usn.ubuntu.com/3752-3/

Weakness Enumeration

CWE-ID CWE Name Source
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') cwe source acceptance level NIST  

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-12232
NVD Published Date:
06/12/2018
NVD Last Modified:
10/31/2018
Source:
MITRE