{"id":"CVE-2025-39829","summary":"trace/fgraph: Fix the warning caused by missing unregister notifier","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntrace/fgraph: Fix the warning caused by missing unregister notifier\n\nThis warning was triggered during testing on v6.16:\n\nnotifier callback ftrace_suspend_notifier_call already registered\nWARNING: CPU: 2 PID: 86 at kernel/notifier.c:23 notifier_chain_register+0x44/0xb0\n...\nCall Trace:\n \u003cTASK\u003e\n blocking_notifier_chain_register+0x34/0x60\n register_ftrace_graph+0x330/0x410\n ftrace_profile_write+0x1e9/0x340\n vfs_write+0xf8/0x420\n ? filp_flush+0x8a/0xa0\n ? filp_close+0x1f/0x30\n ? do_dup2+0xaf/0x160\n ksys_write+0x65/0xe0\n do_syscall_64+0xa4/0x260\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nWhen writing to the function_profile_enabled interface, the notifier was\nnot unregistered after start_graph_tracing failed, causing a warning the\nnext time function_profile_enabled was written.\n\nFixed by adding unregister_pm_notifier in the exception path.","modified":"2026-04-02T12:48:10.361202Z","published":"2025-09-16T13:00:27.154Z","related":["SUSE-SU-2026:0447-1","SUSE-SU-2026:0471-1","SUSE-SU-2026:0472-1","SUSE-SU-2026:0473-1","SUSE-SU-2026:0587-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20555-1","SUSE-SU-2026:20599-1","SUSE-SU-2026:20615-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","openSUSE-SU-2026:20287-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39829.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/000aa47a51233fd38a629b029478e0278e1e9fbe"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2a2deb9f8df70480050351ac27041f19bb9e718b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/edede7a6dcd7435395cf757d053974aaab6ab1c2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39829.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39829"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4a2b8dda3f8705880ec7408135645602d5590f51"},{"fixed":"2a2deb9f8df70480050351ac27041f19bb9e718b"},{"fixed":"000aa47a51233fd38a629b029478e0278e1e9fbe"},{"fixed":"edede7a6dcd7435395cf757d053974aaab6ab1c2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39829.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}