CVE-2023-39191

Advisory lineage Upstream: 0 Downstream: 15
Modified
Published: 04 Oct 2023, 18:03
Last modified:06 Nov 2025, 21:01

Vulnerability Summary

Overall Risk (default)
medium
33/100
CVSS Score
8.2 HIGH
v3.1 (cve.org)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Oct 2023, 18:03
Published
Vulnerability first disclosed
06 Nov 2025, 21:01
Last Modified
Vulnerability information updated

Description

An improper input validation flaw was found in the eBPF subsystem in the Linux kernel. The issue occurs due to a lack of proper validation of dynamic pointers within user-supplied eBPF programs prior to executing them. This may allow an attacker with CAP_BPF privileges to escalate privileges and execute arbitrary code in the context of the kernel.

CVSS Metrics

  • v3.1•HIGH•Score: 8.2CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 4%

Techniques & Countermeasures

  • CWE-20•Improper Input Validation

    The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected Systems

  • fedoraproject•fedora

    38

  • linux•linux_kernel

    ≥ 5.19, < 6.3

  • redhat•enterprise_linux

    9.0

References (7)