CVE-2025-71125 (GCVE-0-2025-71125)
Vulnerability from cvelistv5 – Published: 2026-01-14 15:06 – Updated: 2026-01-14 15:06
VLAI?
Title
tracing: Do not register unsupported perf events
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
4b147936fa509650beaf638b331573c23ba4d609 , < f7305697b60d79bc69c0a6e280fc931b4e8862dd
(git)
Affected: 4b147936fa509650beaf638b331573c23ba4d609 , < 65b1971147ec12f0b1cee0811c859a3d7d9b04ce (git) Affected: 4b147936fa509650beaf638b331573c23ba4d609 , < 3437c775bf209c674ad66304213b6b3c3b1b3f69 (git) Affected: 4b147936fa509650beaf638b331573c23ba4d609 , < 6df47e5bb9b62d72f186f826ab643ea1856877c7 (git) Affected: 4b147936fa509650beaf638b331573c23ba4d609 , < ef7f38df890f5dcd2ae62f8dbde191d72f3bebae (git) |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"kernel/trace/trace_events.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "f7305697b60d79bc69c0a6e280fc931b4e8862dd",
"status": "affected",
"version": "4b147936fa509650beaf638b331573c23ba4d609",
"versionType": "git"
},
{
"lessThan": "65b1971147ec12f0b1cee0811c859a3d7d9b04ce",
"status": "affected",
"version": "4b147936fa509650beaf638b331573c23ba4d609",
"versionType": "git"
},
{
"lessThan": "3437c775bf209c674ad66304213b6b3c3b1b3f69",
"status": "affected",
"version": "4b147936fa509650beaf638b331573c23ba4d609",
"versionType": "git"
},
{
"lessThan": "6df47e5bb9b62d72f186f826ab643ea1856877c7",
"status": "affected",
"version": "4b147936fa509650beaf638b331573c23ba4d609",
"versionType": "git"
},
{
"lessThan": "ef7f38df890f5dcd2ae62f8dbde191d72f3bebae",
"status": "affected",
"version": "4b147936fa509650beaf638b331573c23ba4d609",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"kernel/trace/trace_events.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.17"
},
{
"lessThan": "4.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.160",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.120",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.64",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19-rc2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.160",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.120",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.64",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.3",
"versionStartIncluding": "4.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19-rc2",
"versionStartIncluding": "4.17",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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."
}
],
"providerMetadata": {
"dateUpdated": "2026-01-14T15:06:10.662Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/f7305697b60d79bc69c0a6e280fc931b4e8862dd"
},
{
"url": "https://git.kernel.org/stable/c/65b1971147ec12f0b1cee0811c859a3d7d9b04ce"
},
{
"url": "https://git.kernel.org/stable/c/3437c775bf209c674ad66304213b6b3c3b1b3f69"
},
{
"url": "https://git.kernel.org/stable/c/6df47e5bb9b62d72f186f826ab643ea1856877c7"
},
{
"url": "https://git.kernel.org/stable/c/ef7f38df890f5dcd2ae62f8dbde191d72f3bebae"
}
],
"title": "tracing: Do not register unsupported perf events",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-71125",
"datePublished": "2026-01-14T15:06:10.662Z",
"dateReserved": "2026-01-13T15:30:19.654Z",
"dateUpdated": "2026-01-14T15:06:10.662Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-71125\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-14T15:16:02.213\",\"lastModified\":\"2026-01-14T16:25:12.057\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"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/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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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