{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-39889","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.145Z","datePublished":"2025-09-24T11:02:51.036Z","dateUpdated":"2026-05-11T21:38:23.210Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:38:23.210Z"},"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< HCI Command: Read Encrypti.. (0x05|0x0008) plen 2\n        Handle: 14 Address: 00:1B:DC:F2:24:10 (Vencer Co., Ltd.)\n> 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> 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< 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":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":8.1,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/l2cap_core.c"],"versions":[{"version":"4f911a538e089cce808a15dc3277250f4f8daef9","lessThan":"ed503d340a501e414114ddc614a3aae4f6e9eae2","status":"affected","versionType":"git"},{"version":"288c06973daae4637f25a0d1bdaf65fdbf8455f9","lessThan":"24b2cdfc16e9bd6ab3d03b8e01c590755bd3141f","status":"affected","versionType":"git"},{"version":"288c06973daae4637f25a0d1bdaf65fdbf8455f9","lessThan":"c6d527bbd3d3896375079f5dbc8b7f96734a3ba5","status":"affected","versionType":"git"},{"version":"288c06973daae4637f25a0d1bdaf65fdbf8455f9","lessThan":"9e3114958d87ea88383cbbf38c89e04b8ea1bce5","status":"affected","versionType":"git"},{"version":"288c06973daae4637f25a0d1bdaf65fdbf8455f9","lessThan":"d49798ecd26e0ee7995a7fc1e90ca5cd9b4402d6","status":"affected","versionType":"git"},{"version":"288c06973daae4637f25a0d1bdaf65fdbf8455f9","lessThan":"d4ca2fd218caafbf50e3343ba1260c6a23b5676a","status":"affected","versionType":"git"},{"version":"288c06973daae4637f25a0d1bdaf65fdbf8455f9","lessThan":"522e9ed157e3c21b4dd623c79967f72c21e45b78","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/l2cap_core.c"],"versions":[{"version":"5.11","status":"affected"},{"version":"0","lessThan":"5.11","status":"unaffected","versionType":"semver"},{"version":"5.15.181","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.135","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.88","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.25","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.14.4","lessThanOrEqual":"6.14.*","status":"unaffected","versionType":"semver"},{"version":"6.15","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.181"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.1.135"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.6.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.12.25"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.14.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ed503d340a501e414114ddc614a3aae4f6e9eae2"},{"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"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-326","lang":"en","description":"CWE-326 Inadequate Encryption Strength"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-01-14T17:37:06.505788Z","id":"CVE-2025-39889","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-01-14T17:37:26.762Z"}}]}}