CVE-2025-39829

MEDIUM EPSS 3.3%
Published Sep 16, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 16, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥2.6.30  –  <6.12.45
linuxlinux_kernel*≥6.13  –  <6.16.5
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any

References 3

  • git.kernel.org https://git.kernel.org/stable/c/000aa47a51233fd38a629b029478e0278e1e9fbe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2a2deb9f8df70480050351ac27041f19bb9e718b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/edede7a6dcd7435395cf757d053974aaab6ab1c2
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/000aa47a51233fd38a629b029478e0278e1e9fbe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2a2deb9f8df70480050351ac27041f19bb9e718b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/edede7a6dcd7435395cf757d053974aaab6ab1c2
    Patch