CVE-2025-39829

Published Sep 16, 2025

Last updated 3 months ago

CVSS medium 5.5

Overview

Description
In the Linux kernel, the following vulnerability has been resolved: trace/fgraph: Fix the warning caused by missing unregister notifier This warning was triggered during testing on v6.16: notifier callback ftrace_suspend_notifier_call already registered WARNING: CPU: 2 PID: 86 at kernel/notifier.c:23 notifier_chain_register+0x44/0xb0 ... Call Trace: <TASK> blocking_notifier_chain_register+0x34/0x60 register_ftrace_graph+0x330/0x410 ftrace_profile_write+0x1e9/0x340 vfs_write+0xf8/0x420 ? filp_flush+0x8a/0xa0 ? filp_close+0x1f/0x30 ? do_dup2+0xaf/0x160 ksys_write+0x65/0xe0 do_syscall_64+0xa4/0x260 entry_SYSCALL_64_after_hwframe+0x77/0x7f When writing to the function_profile_enabled interface, the notifier was not unregistered after start_graph_tracing failed, causing a warning the next time function_profile_enabled was written. Fixed by adding unregister_pm_notifier in the exception path.
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status
Modified
Products
linux_kernel

Risk scores

CVSS 3.1

Type
Primary
Base score
5.5
Impact score
3.6
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Severity
MEDIUM

Weaknesses

nvd@nist.gov
NVD-CWE-noinfo

Social media

Hype score
Not currently trending

  1. CVE-2025-39829 trace/fgraph: Fix the warning caused by missing unregister notifier https://t.co/9cthzbMUWA #SecQube #cybersecurity

    @SecQube

    5 Dec 2025

    30 Impressions

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  2. 🔴 SECURITY UPDATE - 04/12/2025 Important CVE-2025-39829 affects multiple Windows systems due to a missing unregister notifier. Immediate action is required to mitigate potential risks. 🛡️ Source: https://t.co/hbD4ui7OtA

    @kernyx64

    4 Dec 2025

    53 Impressions

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  3. 🟠 #Linux Kernel, Trace/Fgraph Vulnerability, #CVE-2025-39829 (Medium) https://t.co/dRHpL3fuNZ

    @dailycve

    2 Dec 2025

    43 Impressions

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Configurations

Related CVEs

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References

Sources include official advisories and independent security research.