Answer in brief
CVE-2025-39829 records a Medium severity (CVSS 5.5) vulnerability in trace/fgraph: Fix the warning caused by missing unregister notifier. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4a2b8dda3f8705880ec7408135645602d5590f51 <aa977309397fe2438801b1ca1ce7bc4106d8e985 || >=4a2b8dda3f8705880ec7408135645602d5590f51 <2a2deb9f8df70480050351ac27041f19bb9e718b || >=4a2b8dda3f8705880ec7408135645602d5590f51 <000aa47a51233fd38a629b029478e0278e1e9fbe || >=4a2b8dda3f8705880ec7408135645602d5590f51 <edede7a6dcd7435395cf757d053974aaab6ab1c2 | aa977309397fe2438801b1ca1ce7bc4106d8e985, 2a2deb9f8df70480050351ac27041f19bb9e718b, 000aa47a51233fd38a629b029478e0278e1e9fbe, edede7a6dcd7435395cf757d053974aaab6ab1c2 |
| Linux/Linuxgeneric | 2.6.30 | Not reported |
Published upstream
Sep 16, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 21, 2026
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.
Quoted source text, attributed separately from HOL analysis.