CVE-2025-39889 (GCVE-0-2025-39889)
Vulnerability from cvelistv5
Published
2025-09-24 11:02
Modified
2025-09-24 11:02
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: Check encryption key size on incoming connection This is required for passing GAP/SEC/SEM/BI-04-C PTS test case: Security Mode 4 Level 4, Responder - Invalid Encryption Key Size - 128 bit This tests the security key with size from 1 to 15 bytes while the Security Mode 4 Level 4 requests 16 bytes key size. Currently PTS fails with the following logs: - expected:Connection Response: Code: [3 (0x03)] Code Identifier: (lt)WildCard: Exists(gt) Length: [8 (0x0008)] Destination CID: (lt)WildCard: Exists(gt) Source CID: [64 (0x0040)] Result: [3 (0x0003)] Connection refused - Security block Status: (lt)WildCard: Exists(gt), but received:Connection Response: Code: [3 (0x03)] Code Identifier: [1 (0x01)] Length: [8 (0x0008)] Destination CID: [64 (0x0040)] Source CID: [64 (0x0040)] Result: [0 (0x0000)] Connection Successful Status: [0 (0x0000)] No further information available And HCI logs: < HCI Command: Read Encrypti.. (0x05|0x0008) plen 2 Handle: 14 Address: 00:1B:DC:F2:24:10 (Vencer Co., Ltd.) > HCI Event: Command Complete (0x0e) plen 7 Read Encryption Key Size (0x05|0x0008) ncmd 1 Status: Success (0x00) Handle: 14 Address: 00:1B:DC:F2:24:10 (Vencer Co., Ltd.) Key size: 7 > ACL Data RX: Handle 14 flags 0x02 dlen 12 L2CAP: Connection Request (0x02) ident 1 len 4 PSM: 4097 (0x1001) Source CID: 64 < ACL Data TX: Handle 14 flags 0x00 dlen 16 L2CAP: Connection Response (0x03) ident 1 len 8 Destination CID: 64 Source CID: 64 Result: Connection successful (0x0000) Status: No further information available (0x0000)
References
Impacted products
Vendor Product Version
Linux Linux Version: 288c06973daae4637f25a0d1bdaf65fdbf8455f9
Version: 288c06973daae4637f25a0d1bdaf65fdbf8455f9
Version: 288c06973daae4637f25a0d1bdaf65fdbf8455f9
Version: 288c06973daae4637f25a0d1bdaf65fdbf8455f9
Version: 288c06973daae4637f25a0d1bdaf65fdbf8455f9
Version: 288c06973daae4637f25a0d1bdaf65fdbf8455f9
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/l2cap_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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            }
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/l2cap_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.181",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.135",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.25",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.181",
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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: l2cap: Check encryption key size on incoming connection\n\nThis is required for passing GAP/SEC/SEM/BI-04-C PTS test case:\n  Security Mode 4 Level 4, Responder - Invalid Encryption Key Size\n  - 128 bit\n\nThis tests the security key with size from 1 to 15 bytes while the\nSecurity Mode 4 Level 4 requests 16 bytes key size.\n\nCurrently PTS fails with the following logs:\n- expected:Connection Response:\n    Code: [3 (0x03)] Code\n    Identifier: (lt)WildCard: Exists(gt)\n    Length: [8 (0x0008)]\n    Destination CID: (lt)WildCard: Exists(gt)\n    Source CID: [64 (0x0040)]\n    Result: [3 (0x0003)] Connection refused - Security block\n    Status: (lt)WildCard: Exists(gt),\nbut received:Connection Response:\n    Code: [3 (0x03)] Code\n    Identifier: [1 (0x01)]\n    Length: [8 (0x0008)]\n    Destination CID: [64 (0x0040)]\n    Source CID: [64 (0x0040)]\n    Result: [0 (0x0000)] Connection Successful\n    Status: [0 (0x0000)] No further information available\n\nAnd HCI logs:\n\u003c HCI Command: Read Encrypti.. (0x05|0x0008) plen 2\n        Handle: 14 Address: 00:1B:DC:F2:24:10 (Vencer Co., Ltd.)\n\u003e HCI Event: Command Complete (0x0e) plen 7\n      Read Encryption Key Size (0x05|0x0008) ncmd 1\n        Status: Success (0x00)\n        Handle: 14 Address: 00:1B:DC:F2:24:10 (Vencer Co., Ltd.)\n        Key size: 7\n\u003e ACL Data RX: Handle 14 flags 0x02 dlen 12\n      L2CAP: Connection Request (0x02) ident 1 len 4\n        PSM: 4097 (0x1001)\n        Source CID: 64\n\u003c ACL Data TX: Handle 14 flags 0x00 dlen 16\n      L2CAP: Connection Response (0x03) ident 1 len 8\n        Destination CID: 64\n        Source CID: 64\n        Result: Connection successful (0x0000)\n        Status: No further information available (0x0000)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-24T11:02:51.036Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/24b2cdfc16e9bd6ab3d03b8e01c590755bd3141f"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6d527bbd3d3896375079f5dbc8b7f96734a3ba5"
        },
        {
          "url": "https://git.kernel.org/stable/c/9e3114958d87ea88383cbbf38c89e04b8ea1bce5"
        },
        {
          "url": "https://git.kernel.org/stable/c/d49798ecd26e0ee7995a7fc1e90ca5cd9b4402d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/d4ca2fd218caafbf50e3343ba1260c6a23b5676a"
        },
        {
          "url": "https://git.kernel.org/stable/c/522e9ed157e3c21b4dd623c79967f72c21e45b78"
        }
      ],
      "title": "Bluetooth: l2cap: Check encryption key size on incoming connection",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39889",
    "datePublished": "2025-09-24T11:02:51.036Z",
    "dateReserved": "2025-04-16T07:20:57.145Z",
    "dateUpdated": "2025-09-24T11:02:51.036Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39889\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-24T11:15:32.780\",\"lastModified\":\"2025-09-24T18:11:24.520\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: l2cap: Check encryption key size on incoming connection\\n\\nThis is required for passing GAP/SEC/SEM/BI-04-C PTS test case:\\n  Security Mode 4 Level 4, Responder - Invalid Encryption Key Size\\n  - 128 bit\\n\\nThis tests the security key with size from 1 to 15 bytes while the\\nSecurity Mode 4 Level 4 requests 16 bytes key size.\\n\\nCurrently PTS fails with the following logs:\\n- expected:Connection Response:\\n    Code: [3 (0x03)] Code\\n    Identifier: (lt)WildCard: Exists(gt)\\n    Length: [8 (0x0008)]\\n    Destination CID: (lt)WildCard: Exists(gt)\\n    Source CID: [64 (0x0040)]\\n    Result: [3 (0x0003)] Connection refused - Security block\\n    Status: (lt)WildCard: Exists(gt),\\nbut received:Connection Response:\\n    Code: [3 (0x03)] Code\\n    Identifier: [1 (0x01)]\\n    Length: [8 (0x0008)]\\n    Destination CID: [64 (0x0040)]\\n    Source CID: [64 (0x0040)]\\n    Result: [0 (0x0000)] Connection Successful\\n    Status: [0 (0x0000)] No further information available\\n\\nAnd HCI logs:\\n\u003c HCI Command: Read Encrypti.. (0x05|0x0008) plen 2\\n        Handle: 14 Address: 00:1B:DC:F2:24:10 (Vencer Co., Ltd.)\\n\u003e HCI Event: Command Complete (0x0e) plen 7\\n      Read Encryption Key Size (0x05|0x0008) ncmd 1\\n        Status: Success (0x00)\\n        Handle: 14 Address: 00:1B:DC:F2:24:10 (Vencer Co., Ltd.)\\n        Key size: 7\\n\u003e ACL Data RX: Handle 14 flags 0x02 dlen 12\\n      L2CAP: Connection Request (0x02) ident 1 len 4\\n        PSM: 4097 (0x1001)\\n        Source CID: 64\\n\u003c ACL Data TX: Handle 14 flags 0x00 dlen 16\\n      L2CAP: Connection Response (0x03) ident 1 len 8\\n        Destination CID: 64\\n        Source CID: 64\\n        Result: Connection successful (0x0000)\\n        Status: No further information available (0x0000)\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/24b2cdfc16e9bd6ab3d03b8e01c590755bd3141f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/522e9ed157e3c21b4dd623c79967f72c21e45b78\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9e3114958d87ea88383cbbf38c89e04b8ea1bce5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c6d527bbd3d3896375079f5dbc8b7f96734a3ba5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d49798ecd26e0ee7995a7fc1e90ca5cd9b4402d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d4ca2fd218caafbf50e3343ba1260c6a23b5676a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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