CVE-2025-40301 (GCVE-0-2025-40301)

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2025-12-08 00:46
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: validate skb length for unknown CC opcode In hci_cmd_complete_evt(), if the command complete event has an unknown opcode, we assume the first byte of the remaining skb->data contains the return status. However, parameter data has previously been pulled in hci_event_func(), which may leave the skb empty. If so, using skb->data[0] for the return status uses un-init memory. The fix is to check skb->len before using skb->data.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: afcb3369f46ed5dc883a7b92f2dd1e264d79d388 , < fea895de78d3bb2f0c09db9f10b18f8121b15759 (git)
Affected: afcb3369f46ed5dc883a7b92f2dd1e264d79d388 , < 779f83a91d4f1bf5ddfeaf528420cbb6dbf03fa8 (git)
Affected: afcb3369f46ed5dc883a7b92f2dd1e264d79d388 , < cf2c2acec1cf456c3d11c11a7589e886a0f963a9 (git)
Affected: afcb3369f46ed5dc883a7b92f2dd1e264d79d388 , < 1a0ddaaf97405dbd11d4cb5a961a3f82400e8a50 (git)
Affected: afcb3369f46ed5dc883a7b92f2dd1e264d79d388 , < 5c5f1f64681cc889d9b13e4a61285e9e029d6ab5 (git)
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    Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.117 , ≤ 6.6.* (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "version": "6.1.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.159",
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                  "vulnerable": true
                },
                {
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                },
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              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: validate skb length for unknown CC opcode\n\nIn hci_cmd_complete_evt(), if the command complete event has an unknown\nopcode, we assume the first byte of the remaining skb-\u003edata contains the\nreturn status. However, parameter data has previously been pulled in\nhci_event_func(), which may leave the skb empty. If so, using skb-\u003edata[0]\nfor the return status uses un-init memory.\n\nThe fix is to check skb-\u003elen before using skb-\u003edata."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-08T00:46:24.863Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fea895de78d3bb2f0c09db9f10b18f8121b15759"
        },
        {
          "url": "https://git.kernel.org/stable/c/779f83a91d4f1bf5ddfeaf528420cbb6dbf03fa8"
        },
        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/1a0ddaaf97405dbd11d4cb5a961a3f82400e8a50"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c5f1f64681cc889d9b13e4a61285e9e029d6ab5"
        }
      ],
      "title": "Bluetooth: hci_event: validate skb length for unknown CC opcode",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40301",
    "datePublished": "2025-12-08T00:46:24.863Z",
    "dateReserved": "2025-04-16T07:20:57.185Z",
    "dateUpdated": "2025-12-08T00:46:24.863Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40301\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-08T01:16:02.183\",\"lastModified\":\"2025-12-08T18:26:49.133\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: hci_event: validate skb length for unknown CC opcode\\n\\nIn hci_cmd_complete_evt(), if the command complete event has an unknown\\nopcode, we assume the first byte of the remaining skb-\u003edata contains the\\nreturn status. However, parameter data has previously been pulled in\\nhci_event_func(), which may leave the skb empty. If so, using skb-\u003edata[0]\\nfor the return status uses un-init memory.\\n\\nThe fix is to check skb-\u003elen before using skb-\u003edata.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1a0ddaaf97405dbd11d4cb5a961a3f82400e8a50\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5c5f1f64681cc889d9b13e4a61285e9e029d6ab5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/779f83a91d4f1bf5ddfeaf528420cbb6dbf03fa8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf2c2acec1cf456c3d11c11a7589e886a0f963a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fea895de78d3bb2f0c09db9f10b18f8121b15759\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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