CVE-2025-39829

Description

In the Linux kernel, the following vulnerability has been resolved:trace/fgraph: Fix the warning caused by missing unregister notifierThis warning was triggered during testing on v6.16:notifier callback ftrace_suspend_notifier_call already registeredWARNING: CPU: 2 PID: 86 at kernel/notifier.c:23 notifier_chain_register+0x44/0xb0...Call Trace: 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+0x77/0x7fWhen writing to the function_profile_enabled interface, the notifier wasnot unregistered after start_graph_tracing failed, causing a warning thenext time function_profile_enabled was written.Fixed by adding unregister_pm_notifier in the exception path.

Risk Information

Base Score

5.5

MODERATE

Vector

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

EPSS Score

Exploitation Probability

0.012

Associated Vulnerability

No records found

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234