CVE-2018-12232

Advisory lineage Upstream: 0 Downstream: 14
Modified
Published: 12 Jun 2018, 12:00
Last modified:05 Aug 2024, 08:30

Vulnerability Summary

Overall Risk (default)
medium
29/100
CVSS Score
7.1 HIGH
v2.0 (nvd)
EPSS Score
3.32% LOW
3% probability +0.02%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

12 Jun 2018, 12:00
Published
Vulnerability first disclosed
05 Aug 2024, 08:30
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.0•MEDIUM•Score: 5.9CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•HIGH•Score: 7.1AV:N/AC:M/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 3.32%• Percentile: 87%

Techniques & Countermeasures

  • CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

    The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Systems

  • linux•linux_kernel

    ≤ 4.17.1

References (9)