CVE-2023-39189

Advisory lineage Upstream: 0 Downstream: 40
Modified
Published: 09 Oct 2023, 17:57
Last modified:06 Nov 2025, 19:47

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
6 MEDIUM
v3.1 (nvd)
EPSS Score
<0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

09 Oct 2023, 17:57
Published
Vulnerability first disclosed
06 Nov 2025, 19:47
Last Modified
Vulnerability information updated

Description

A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.1CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L
  • v3.1•MEDIUM•Score: 6CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 1%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • fedoraproject•fedora

    38

  • linux•linux_kernel

    < 6.6

  • redhat•enterprise_linux

    8.0 | 9.0

References (6)