CVE-2025-38636 (GCVE-0-2025-38636)
Vulnerability from cvelistv5
Published
2025-08-22 16:00
Modified
2025-09-29 05:55
Severity ?
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
Vendor Product Version
Linux Linux Version: 792575348ff70e05c6040d02fce38e949ef92c37
Version: 792575348ff70e05c6040d02fce38e949ef92c37
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/rv/rv_trace.h"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "vendor": "Linux",
          "versions": [
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              "version": "6.0"
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              "version": "0",
              "versionType": "semver"
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              "version": "6.16.1",
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            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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                  "versionEndExcluding": "6.16.1",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
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                  "versionEndExcluding": "6.17",
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              "operator": "OR"
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      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-29T05:55:15.703Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0ebc70d973ce7a81826b5c4f55f743e07f5864d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/7f904ff6e58d398c4336f3c19c42b338324451f7"
        }
      ],
      "title": "rv: Use strings in da monitors tracepoints",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "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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