FKIE_CVE-2025-71125

Vulnerability from fkie_nvd - Published: 2026-01-14 15:16 - Updated: 2026-01-19 13:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Do not register unsupported perf events Synthetic events currently do not have a function to register perf events. This leads to calling the tracepoint register functions with a NULL function pointer which triggers: ------------[ cut here ]------------ WARNING: kernel/tracepoint.c:175 at tracepoint_add_func+0x357/0x370, CPU#2: perf/2272 Modules linked in: kvm_intel kvm irqbypass CPU: 2 UID: 0 PID: 2272 Comm: perf Not tainted 6.18.0-ftest-11964-ge022764176fc-dirty #323 PREEMPTLAZY Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-debian-1.17.0-1 04/01/2014 RIP: 0010:tracepoint_add_func+0x357/0x370 Code: 28 9c e8 4c 0b f5 ff eb 0f 4c 89 f7 48 c7 c6 80 4d 28 9c e8 ab 89 f4 ff 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc <0f> 0b 49 c7 c6 ea ff ff ff e9 ee fe ff ff 0f 0b e9 f9 fe ff ff 0f RSP: 0018:ffffabc0c44d3c40 EFLAGS: 00010246 RAX: 0000000000000001 RBX: ffff9380aa9e4060 RCX: 0000000000000000 RDX: 000000000000000a RSI: ffffffff9e1d4a98 RDI: ffff937fcf5fd6c8 RBP: 0000000000000001 R08: 0000000000000007 R09: ffff937fcf5fc780 R10: 0000000000000003 R11: ffffffff9c193910 R12: 000000000000000a R13: ffffffff9e1e5888 R14: 0000000000000000 R15: ffffabc0c44d3c78 FS: 00007f6202f5f340(0000) GS:ffff93819f00f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d3162281a8 CR3: 0000000106a56003 CR4: 0000000000172ef0 Call Trace: <TASK> tracepoint_probe_register+0x5d/0x90 synth_event_reg+0x3c/0x60 perf_trace_event_init+0x204/0x340 perf_trace_init+0x85/0xd0 perf_tp_event_init+0x2e/0x50 perf_try_init_event+0x6f/0x230 ? perf_event_alloc+0x4bb/0xdc0 perf_event_alloc+0x65a/0xdc0 __se_sys_perf_event_open+0x290/0x9f0 do_syscall_64+0x93/0x7b0 ? entry_SYSCALL_64_after_hwframe+0x76/0x7e ? trace_hardirqs_off+0x53/0xc0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Instead, have the code return -ENODEV, which doesn't warn and has perf error out with: # perf record -e synthetic:futex_wait Error: The sys_perf_event_open() syscall returned with 19 (No such device) for event (synthetic:futex_wait). "dmesg | grep -i perf" may provide additional information. Ideally perf should support synthetic events, but for now just fix the warning. The support can come later.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3437c775bf209c674ad66304213b6b3c3b1b3f69
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/65b1971147ec12f0b1cee0811c859a3d7d9b04ce
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6819bc6285c0ff835f67cfae7efebc03541782f6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d15f08e6d8d4b4fb02d90805ea97f3e2c1d6fbc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6df47e5bb9b62d72f186f826ab643ea1856877c7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef7f38df890f5dcd2ae62f8dbde191d72f3bebae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f7305697b60d79bc69c0a6e280fc931b4e8862dd
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Do not register unsupported perf events\n\nSynthetic events currently do not have a function to register perf events.\nThis leads to calling the tracepoint register functions with a NULL\nfunction pointer which triggers:\n\n ------------[ cut here ]------------\n WARNING: kernel/tracepoint.c:175 at tracepoint_add_func+0x357/0x370, CPU#2: perf/2272\n Modules linked in: kvm_intel kvm irqbypass\n CPU: 2 UID: 0 PID: 2272 Comm: perf Not tainted 6.18.0-ftest-11964-ge022764176fc-dirty #323 PREEMPTLAZY\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.17.0-debian-1.17.0-1 04/01/2014\n RIP: 0010:tracepoint_add_func+0x357/0x370\n Code: 28 9c e8 4c 0b f5 ff eb 0f 4c 89 f7 48 c7 c6 80 4d 28 9c e8 ab 89 f4 ff 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc \u003c0f\u003e 0b 49 c7 c6 ea ff ff ff e9 ee fe ff ff 0f 0b e9 f9 fe ff ff 0f\n RSP: 0018:ffffabc0c44d3c40 EFLAGS: 00010246\n RAX: 0000000000000001 RBX: ffff9380aa9e4060 RCX: 0000000000000000\n RDX: 000000000000000a RSI: ffffffff9e1d4a98 RDI: ffff937fcf5fd6c8\n RBP: 0000000000000001 R08: 0000000000000007 R09: ffff937fcf5fc780\n R10: 0000000000000003 R11: ffffffff9c193910 R12: 000000000000000a\n R13: ffffffff9e1e5888 R14: 0000000000000000 R15: ffffabc0c44d3c78\n FS:  00007f6202f5f340(0000) GS:ffff93819f00f000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 000055d3162281a8 CR3: 0000000106a56003 CR4: 0000000000172ef0\n Call Trace:\n  \u003cTASK\u003e\n  tracepoint_probe_register+0x5d/0x90\n  synth_event_reg+0x3c/0x60\n  perf_trace_event_init+0x204/0x340\n  perf_trace_init+0x85/0xd0\n  perf_tp_event_init+0x2e/0x50\n  perf_try_init_event+0x6f/0x230\n  ? perf_event_alloc+0x4bb/0xdc0\n  perf_event_alloc+0x65a/0xdc0\n  __se_sys_perf_event_open+0x290/0x9f0\n  do_syscall_64+0x93/0x7b0\n  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e\n  ? trace_hardirqs_off+0x53/0xc0\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nInstead, have the code return -ENODEV, which doesn\u0027t warn and has perf\nerror out with:\n\n # perf record -e synthetic:futex_wait\nError:\nThe sys_perf_event_open() syscall returned with 19 (No such device) for event (synthetic:futex_wait).\n\"dmesg | grep -i perf\" may provide additional information.\n\nIdeally perf should support synthetic events, but for now just fix the\nwarning. The support can come later."
    }
  ],
  "id": "CVE-2025-71125",
  "lastModified": "2026-01-19T13:16:19.113",
  "metrics": {},
  "published": "2026-01-14T15:16:02.213",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3437c775bf209c674ad66304213b6b3c3b1b3f69"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/65b1971147ec12f0b1cee0811c859a3d7d9b04ce"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6819bc6285c0ff835f67cfae7efebc03541782f6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6d15f08e6d8d4b4fb02d90805ea97f3e2c1d6fbc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6df47e5bb9b62d72f186f826ab643ea1856877c7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ef7f38df890f5dcd2ae62f8dbde191d72f3bebae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f7305697b60d79bc69c0a6e280fc931b4e8862dd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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