GHSA-HHGH-XJ97-6F9R

Vulnerability from github – Published: 2025-09-24 12:30 – Updated: 2025-09-24 12:30
VLAI?
Details

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)

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39889"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-24T11:15:32Z",
    "severity": null
  },
  "details": "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)",
  "id": "GHSA-hhgh-xj97-6f9r",
  "modified": "2025-09-24T12:30:20Z",
  "published": "2025-09-24T12:30:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39889"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24b2cdfc16e9bd6ab3d03b8e01c590755bd3141f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/522e9ed157e3c21b4dd623c79967f72c21e45b78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e3114958d87ea88383cbbf38c89e04b8ea1bce5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6d527bbd3d3896375079f5dbc8b7f96734a3ba5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d49798ecd26e0ee7995a7fc1e90ca5cd9b4402d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d4ca2fd218caafbf50e3343ba1260c6a23b5676a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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