{"id":"CVE-2025-39829","state":"PUBLISHED","title":"trace/fgraph: Fix the warning caused by missing unregister notifier","description":"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 <TASK>\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.","publishedAt":"2025-09-16T13:00:27.154Z","updatedAt":"2026-10-30T12:22:31.014Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4a2b8dda3f8705880ec7408135645602d5590f51","status":"affected","lessThan":"3cfa337c1adceda1632aefee4c3562440446ce51","versionType":"git"},{"version":"4a2b8dda3f8705880ec7408135645602d5590f51","status":"affected","lessThan":"aa977309397fe2438801b1ca1ce7bc4106d8e985","versionType":"git"},{"version":"4a2b8dda3f8705880ec7408135645602d5590f51","status":"affected","lessThan":"2a2deb9f8df70480050351ac27041f19bb9e718b","versionType":"git"},{"version":"4a2b8dda3f8705880ec7408135645602d5590f51","status":"affected","lessThan":"000aa47a51233fd38a629b029478e0278e1e9fbe","versionType":"git"},{"version":"4a2b8dda3f8705880ec7408135645602d5590f51","status":"affected","lessThan":"edede7a6dcd7435395cf757d053974aaab6ab1c2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/fgraph.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.30","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.30","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.45","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.16.5","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/fgraph.c"]}],"references":["https://git.kernel.org/stable/c/3cfa337c1adceda1632aefee4c3562440446ce51","https://git.kernel.org/stable/c/aa977309397fe2438801b1ca1ce7bc4106d8e985","https://git.kernel.org/stable/c/2a2deb9f8df70480050351ac27041f19bb9e718b","https://git.kernel.org/stable/c/000aa47a51233fd38a629b029478e0278e1e9fbe","https://git.kernel.org/stable/c/edede7a6dcd7435395cf757d053974aaab6ab1c2"],"weaknesses":[],"ingestedAt":"2026-10-30T12:40:04.423Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/39xxx/CVE-2025-39829.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-39829","state":"PUBLISHED","datePublished":"2025-09-16T13:00:27.154Z","dateUpdated":"2026-10-30T12:22:31.014Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.140Z"},"containers":{"cna":{"title":"trace/fgraph: Fix the warning caused by missing unregister notifier","descriptions":[{"lang":"en","value":"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 <TASK>\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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4a2b8dda3f8705880ec7408135645602d5590f51","status":"affected","lessThan":"3cfa337c1adceda1632aefee4c3562440446ce51","versionType":"git"},{"version":"4a2b8dda3f8705880ec7408135645602d5590f51","status":"affected","lessThan":"aa977309397fe2438801b1ca1ce7bc4106d8e985","versionType":"git"},{"version":"4a2b8dda3f8705880ec7408135645602d5590f51","status":"affected","lessThan":"2a2deb9f8df70480050351ac27041f19bb9e718b","versionType":"git"},{"version":"4a2b8dda3f8705880ec7408135645602d5590f51","status":"affected","lessThan":"000aa47a51233fd38a629b029478e0278e1e9fbe","versionType":"git"},{"version":"4a2b8dda3f8705880ec7408135645602d5590f51","status":"affected","lessThan":"edede7a6dcd7435395cf757d053974aaab6ab1c2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/fgraph.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.30","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.30","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.45","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.16.5","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/fgraph.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3cfa337c1adceda1632aefee4c3562440446ce51"},{"url":"https://git.kernel.org/stable/c/aa977309397fe2438801b1ca1ce7bc4106d8e985"},{"url":"https://git.kernel.org/stable/c/2a2deb9f8df70480050351ac27041f19bb9e718b"},{"url":"https://git.kernel.org/stable/c/000aa47a51233fd38a629b029478e0278e1e9fbe"},{"url":"https://git.kernel.org/stable/c/edede7a6dcd7435395cf757d053974aaab6ab1c2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:22:31.014Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.12.45"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.16.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2025-39829","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-01-14T18:17:20.629374Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-noinfo Not enough information"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-14T18:22:56.447Z"}}]}}}