CVE-2023-54139
Unknown Unknown - Not Provided
Integer Overflow in Linux Kernel tracing/user_events Allows OOB Access

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: tracing/user_events: Ensure write index cannot be negative The write index indicates which event the data is for and accesses a per-file array. The index is passed by user processes during write() calls as the first 4 bytes. Ensure that it cannot be negative by returning -EINVAL to prevent out of bounds accesses. Update ftrace self-test to ensure this occurs properly.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-06-16
AI Q&A
2025-12-24
EPSS Evaluated
2026-06-15
NVD
CVE-2023-54139
EUVD
EUVD-2023-60306
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability in the Linux kernel involves the tracing/user_events component where the write index, which indicates the event data position, can be negative. Since the index is passed by user processes during write() calls as the first 4 bytes, a negative value could lead to out of bounds accesses on a per-file array. The fix ensures that the write index cannot be negative by returning an error (-EINVAL) to prevent such invalid accesses.

Impact Analysis

If exploited, this vulnerability could allow a user process to cause out of bounds memory access in the kernel, potentially leading to system instability, crashes, or security issues such as information disclosure or privilege escalation.

Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version where the fix has been applied, ensuring that the write index cannot be negative and out of bounds accesses are prevented.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2023-54139. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart