{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-38327", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38327", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-07-10T08:15:01.577Z", "updatedAt": "2026-05-11T21:25:50.528Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "fgraph: Do not enable function_graph tracer when setting funcgraph-args", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nfgraph: Do not enable function_graph tracer when setting funcgraph-args\n\nWhen setting the funcgraph-args option when function graph tracer is net\nenabled, it incorrectly enables it. Worse, it unregisters itself when it\nwas never registered. Then when it gets enabled again, it will register\nitself a second time causing a WARNing.\n\n ~# echo 1 > /sys/kernel/tracing/options/funcgraph-args\n ~# head -20 /sys/kernel/tracing/trace\n # tracer: nop\n #\n # entries-in-buffer/entries-written: 813/26317372 #P:8\n #\n # _-----=> irqs-off/BH-disabled\n # / _----=> need-resched\n # | / _---=> hardirq/softirq\n # || / _--=> preempt-depth\n # ||| / _-=> migrate-disable\n # |||| / delay\n # TASK-PID CPU# ||||| TIMESTAMP FUNCTION\n # | | | ||||| | |\n -0 [007] d..4. 358.966010: 7) 1.692 us | fetch_next_timer_interrupt(basej=4294981640, basem=357956000000, base_local=0xffff88823c3ae040, base_global=0xffff88823c3af300, tevt=0xffff888100e47cb8);\n -0 [007] d..4. 358.966012: 7) | tmigr_cpu_deactivate(nextexp=357988000000) {\n -0 [007] d..4. 358.966013: 7) | _raw_spin_lock(lock=0xffff88823c3b2320) {\n -0 [007] d..4. 358.966014: 7) 0.981 us | preempt_count_add(val=1);\n -0 [007] d..5. 358.966017: 7) 1.058 us | do_raw_spin_lock(lock=0xffff88823c3b2320);\n -0 [007] d..4. 358.966019: 7) 5.824 us | }\n -0 [007] d..5. 358.966021: 7) | tmigr_inactive_up(group=0xffff888100cb9000, child=0x0, data=0xffff888100e47bc0) {\n -0 [007] d..5. 358.966022: 7) | tmigr_update_events(group=0xffff888100cb9000, child=0x0, data=0xffff888100e47bc0) {\n\nNotice the \"tracer: nop\" at the top there. The current tracer is the \"nop\"\ntracer, but the content is obviously the function graph tracer.\n\nEnabling function graph tracing will cause it to register again and\ntrigger a warning in the accounting:\n\n ~# echo function_graph > /sys/kernel/tracing/current_tracer\n -bash: echo: write error: Device or resource busy\n\nWith the dmesg of:\n\n ------------[ cut here ]------------\n WARNING: CPU: 7 PID: 1095 at kernel/trace/ftrace.c:3509 ftrace_startup_subops+0xc1e/0x1000\n Modules linked in: kvm_intel kvm irqbypass\n CPU: 7 UID: 0 PID: 1095 Comm: bash Not tainted 6.16.0-rc2-test-00006-gea03de4105d3 #24 PREEMPT\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n RIP: 0010:ftrace_startup_subops+0xc1e/0x1000\n Code: 48 b8 22 01 00 00 00 00 ad de 49 89 84 24 88 01 00 00 8b 44 24 08 89 04 24 e9 c3 f7 ff ff c7 04 24 ed ff ff ff e9 b7 f7 ff ff <0f> 0b c7 04 24 f0 ff ff ff e9 a9 f7 ff ff c7 04 24 f4 ff ff ff e9\n RSP: 0018:ffff888133cff948 EFLAGS: 00010202\n RAX: 0000000000000001 RBX: 1ffff1102679ff31 RCX: 0000000000000000\n RDX: 1ffffffff0b27a60 RSI: ffffffff8593d2f0 RDI: ffffffff85941140\n RBP: 00000000000c2041 R08: ffffffffffffffff R09: ffffed1020240221\n R10: ffff88810120110f R11: ffffed1020240214 R12: ffffffff8593d2f0\n R13: ffffffff8593d300 R14: ffffffff85941140 R15: ffffffff85631100\n FS: 00007f7ec6f28740(0000) GS:ffff8882b5251000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f7ec6f181c0 CR3: 000000012f1d0005 CR4: 0000000000172ef0\n Call Trace:\n \n ? __pfx_ftrace_startup_subops+0x10/0x10\n ? find_held_lock+0x2b/0x80\n ? ftrace_stub_direct_tramp+0x10/0x10\n ? ftrace_stub_direct_tramp+0x10/0x10\n ? trace_preempt_on+0xd0/0x110\n ? __pfx_trace_graph_entry_args+0x10/\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "c7a60a733c373eed0094774c141bf2934237e7ff", "status": "affected", "versionType": "git", "lessThan": "300dedd9fe182d4c7424550d81cee595994486d1" }, { "version": "c7a60a733c373eed0094774c141bf2934237e7ff", "status": "affected", "versionType": "git", "lessThan": "327e28664307d49ce3fa71ba30dcc0007c270974" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.15", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.15" }, { "version": "6.15.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.15.*" }, { "version": "6.16", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }