CVE-2023-4147

Advisory lineage Upstream: 0 Downstream: 39
Modified
Published: 07 Aug 2023, 13:19
Last modified:25 Feb 2026, 17:20

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.18% LOW
0% probability +0.02%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

07 Aug 2023, 13:19
Published
Vulnerability first disclosed
25 Feb 2026, 17:20
Last Modified
Vulnerability information updated

Description

A use-after-free flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.18%• Percentile: 39%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•debian_linux

    10.0 | 11.0 | 12.0

  • fedoraproject•fedora

    38

  • linux•linux_kernel

    ≥ 5.9, < 5.10.190 | ≥ 5.11, < 5.15.124 | ≥ 5.16, < 6.1.43 | ≥ 6.2, < 6.4.8 | 6.5:rc1 | 6.5:rc2 | 6.5:rc3

  • redhat•enterprise_linux

    9.0

  • redhat•enterprise_linux_eus

    9.2

  • redhat•enterprise_linux_for_real_time

    9.0

  • redhat•enterprise_linux_for_real_time_for_nfv

    9.0

  • redhat•enterprise_linux_server_aus

    9.2

References (14)