🛡️ AZL-71209 — kernel

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2025-39829 affecting package kernel 5.15.200.1-1

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.

Affected software

AZL-71209 is recorded against 1 package.

  • kernel

Timeline and source

Published on 16 September 2025 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2025-09-16
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel — —

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