DEBIAN-CVE-2025-39829
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.
Risk Scores
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | linux | 0, 6.12.43-1~bpo12+1, 6.12.43-1 |
| Debian:12 | linux | 7.0.13-1, 6.9.10-1, 6.9.10-1~bpo12+1 |
| Debian:14 | linux | 6.12.113-1, 6.12.38-1, 6.12.41-1 |
Timeline
- Sep 16, 2025 CVE Published
- Oct 23, 2026 CVE Updated