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CVE-2025-39914

kernel: tracing: Silence warning when chunk allocation fails in trace_pid_write

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Severity

Moderate

Red Hat Product Security

5.8

CVSS 3.1

Review impact separately from score.

Published · October 1, 2025

Updated · June 30, 2026

Description

A flaw was found in the Linux kernel’s tracing subsystem (tracepoint.c). When chunk allocation fails in trace_pid_list_alloc (e.g., via a fault-injection in Syzkaller), the function trace_pid_list_set lacks proper error-handling. Under these conditions, a double registration of the same tracepoint can occur, producing a warning and potentially destabilizing tracing logic.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

CVSS / CWE

CVSS 3.1 · 5.8
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H

CWE-908 · Use of Uninitialized Resource