CVE-2025-38636 (GCVE-0-2025-38636)
Vulnerability from cvelistv5
Published
2025-08-22 16:00
Modified
2025-09-29 05:55
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
rv: Use strings in da monitors tracepoints
Using DA monitors tracepoints with KASAN enabled triggers the following
warning:
BUG: KASAN: global-out-of-bounds in do_trace_event_raw_event_event_da_monitor+0xd6/0x1a0
Read of size 32 at addr ffffffffaada8980 by task ...
Call Trace:
<TASK>
[...]
do_trace_event_raw_event_event_da_monitor+0xd6/0x1a0
? __pfx_do_trace_event_raw_event_event_da_monitor+0x10/0x10
? trace_event_sncid+0x83/0x200
trace_event_sncid+0x163/0x200
[...]
The buggy address belongs to the variable:
automaton_snep+0x4e0/0x5e0
This is caused by the tracepoints reading 32 bytes __array instead of
__string from the automata definition. Such strings are literals and
reading 32 bytes ends up in out of bound memory accesses (e.g. the next
automaton's data in this case).
The error is harmless as, while printing the string, we stop at the null
terminator, but it should still be fixed.
Use the __string facilities while defining the tracepoints to avoid
reading out of bound memory.
References
Impacted products
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"versions": [
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"versions": [
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"status": "unaffected",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrv: Use strings in da monitors tracepoints\n\nUsing DA monitors tracepoints with KASAN enabled triggers the following\nwarning:\n\n BUG: KASAN: global-out-of-bounds in do_trace_event_raw_event_event_da_monitor+0xd6/0x1a0\n Read of size 32 at addr ffffffffaada8980 by task ...\n Call Trace:\n \u003cTASK\u003e\n [...]\n do_trace_event_raw_event_event_da_monitor+0xd6/0x1a0\n ? __pfx_do_trace_event_raw_event_event_da_monitor+0x10/0x10\n ? trace_event_sncid+0x83/0x200\n trace_event_sncid+0x163/0x200\n [...]\n The buggy address belongs to the variable:\n automaton_snep+0x4e0/0x5e0\n\nThis is caused by the tracepoints reading 32 bytes __array instead of\n__string from the automata definition. Such strings are literals and\nreading 32 bytes ends up in out of bound memory accesses (e.g. the next\nautomaton\u0027s data in this case).\nThe error is harmless as, while printing the string, we stop at the null\nterminator, but it should still be fixed.\n\nUse the __string facilities while defining the tracepoints to avoid\nreading out of bound memory."
}
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"dateUpdated": "2025-09-29T05:55:15.703Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/0ebc70d973ce7a81826b5c4f55f743e07f5864d9"
},
{
"url": "https://git.kernel.org/stable/c/7f904ff6e58d398c4336f3c19c42b338324451f7"
}
],
"title": "rv: Use strings in da monitors tracepoints",
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-38636",
"datePublished": "2025-08-22T16:00:43.910Z",
"dateReserved": "2025-04-16T04:51:24.030Z",
"dateUpdated": "2025-09-29T05:55:15.703Z",
"state": "PUBLISHED"
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"nvd": "{\"cve\":{\"id\":\"CVE-2025-38636\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-22T16:15:37.587\",\"lastModified\":\"2025-08-22T18:08:51.663\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nrv: Use strings in da monitors tracepoints\\n\\nUsing DA monitors tracepoints with KASAN enabled triggers the following\\nwarning:\\n\\n BUG: KASAN: global-out-of-bounds in do_trace_event_raw_event_event_da_monitor+0xd6/0x1a0\\n Read of size 32 at addr ffffffffaada8980 by task ...\\n Call Trace:\\n \u003cTASK\u003e\\n [...]\\n do_trace_event_raw_event_event_da_monitor+0xd6/0x1a0\\n ? __pfx_do_trace_event_raw_event_event_da_monitor+0x10/0x10\\n ? trace_event_sncid+0x83/0x200\\n trace_event_sncid+0x163/0x200\\n [...]\\n The buggy address belongs to the variable:\\n automaton_snep+0x4e0/0x5e0\\n\\nThis is caused by the tracepoints reading 32 bytes __array instead of\\n__string from the automata definition. Such strings are literals and\\nreading 32 bytes ends up in out of bound memory accesses (e.g. the next\\nautomaton\u0027s data in this case).\\nThe error is harmless as, while printing the string, we stop at the null\\nterminator, but it should still be fixed.\\n\\nUse the __string facilities while defining the tracepoints to avoid\\nreading out of bound memory.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0ebc70d973ce7a81826b5c4f55f743e07f5864d9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7f904ff6e58d398c4336f3c19c42b338324451f7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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