CVE-2025-68799 (GCVE-0-2025-68799)
Vulnerability from cvelistv5
Published
2026-01-13 15:29
Modified
2026-02-09 08:33
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: caif: fix integer underflow in cffrml_receive() The cffrml_receive() function extracts a length field from the packet header and, when FCS is disabled, subtracts 2 from this length without validating that len >= 2. If an attacker sends a malicious packet with a length field of 0 or 1 to an interface with FCS disabled, the subtraction causes an integer underflow. This can lead to memory exhaustion and kernel instability, potential information disclosure if padding contains uninitialized kernel memory. Fix this by validating that len >= 2 before performing the subtraction.
References
Impacted products
Vendor Product Version
Linux Linux Version: b482cd2053e3b90a7b33a78c63cdb6badf2ec383
Version: b482cd2053e3b90a7b33a78c63cdb6badf2ec383
Version: b482cd2053e3b90a7b33a78c63cdb6badf2ec383
Version: b482cd2053e3b90a7b33a78c63cdb6badf2ec383
Version: b482cd2053e3b90a7b33a78c63cdb6badf2ec383
Version: b482cd2053e3b90a7b33a78c63cdb6badf2ec383
Version: b482cd2053e3b90a7b33a78c63cdb6badf2ec383
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{
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncaif: fix integer underflow in cffrml_receive()\n\nThe cffrml_receive() function extracts a length field from the packet\nheader and, when FCS is disabled, subtracts 2 from this length without\nvalidating that len \u003e= 2.\n\nIf an attacker sends a malicious packet with a length field of 0 or 1\nto an interface with FCS disabled, the subtraction causes an integer\nunderflow.\n\nThis can lead to memory exhaustion and kernel instability, potential\ninformation disclosure if padding contains uninitialized kernel memory.\n\nFix this by validating that len \u003e= 2 before performing the subtraction."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:33:47.455Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/f407f1c9f45bbf5c99fd80b3f3f4a94fdbe35691"
        },
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          "url": "https://git.kernel.org/stable/c/c54091eec6fed19e94182aa05dd6846600a642f7"
        },
        {
          "url": "https://git.kernel.org/stable/c/785c7be6361630070790f6235b696da156ac71b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/f818cd472565f8b0c2c409b040e0121c5cf8592c"
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        {
          "url": "https://git.kernel.org/stable/c/4ec29714aa4e0601ea29d2f02b461fc0ac92c2c3"
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        {
          "url": "https://git.kernel.org/stable/c/21fdcc00656a60af3c7aae2dea8dd96abd35519c"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a11ff0948b5ad09b71896b7ccc850625f9878d1"
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      "title": "caif: fix integer underflow in cffrml_receive()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68799",
    "datePublished": "2026-01-13T15:29:09.012Z",
    "dateReserved": "2025-12-24T10:30:51.042Z",
    "dateUpdated": "2026-02-09T08:33:47.455Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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