{"id":"CVE-2026-64408","title":"Bluetooth: bnep: pin L2CAP connection during netdev registration","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bnep: pin L2CAP connection during netdev registration\n\nbnep_add_connection() reads the L2CAP connection without holding the\nchannel lock, then passes its HCI…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < 390b5db3ff8745187f094c4e915663b7b1f98944","Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < 46a88784c4c9b96954dd86f747ce93f65efa1302","Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < 551ae773ec64045b4e72099132654887e0270bcc","Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < ae215c5b6422d8eda443b861b124bd1be6969c31","Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < df22adc7eafc22e651561813c11dc51a796b12ee","Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < a6b22dbd80926556290ad2243be25218d6956a19","Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < 563a8573047182f550b1e1e030615755cd8c41da","Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < bb067a99a0356196c0b89a95721985485ebce5a5","Linux 3.13"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:40:17.231928Z"},"published":"2026-07-25","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:42:34.216Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64408","references":[{"url":"https://git.kernel.org/stable/c/390b5db3ff8745187f094c4e915663b7b1f98944"},{"url":"https://git.kernel.org/stable/c/46a88784c4c9b96954dd86f747ce93f65efa1302"},{"url":"https://git.kernel.org/stable/c/551ae773ec64045b4e72099132654887e0270bcc"},{"url":"https://git.kernel.org/stable/c/ae215c5b6422d8eda443b861b124bd1be6969c31"},{"url":"https://git.kernel.org/stable/c/df22adc7eafc22e651561813c11dc51a796b12ee"},{"url":"https://git.kernel.org/stable/c/a6b22dbd80926556290ad2243be25218d6956a19"},{"url":"https://git.kernel.org/stable/c/563a8573047182f550b1e1e030615755cd8c41da"},{"url":"https://git.kernel.org/stable/c/bb067a99a0356196c0b89a95721985485ebce5a5"}],"tags":["cve.org"],"epss":0.00262,"epssPercentile":0.1684,"ingestedAt":"2026-10-16T17:24:46.816Z","slug":"CVE-2026-64408","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bnep: pin L2CAP connection during netdev registration\n\nbnep_add_connection() reads the L2CAP connection without holding the\nchannel lock, then passes its HCI device to register_netdev(). Controller\nteardown can clear and release that connection concurrently, leaving the\nnetwork device registration path to dereference a freed parent device.\n\nTake a reference to the L2CAP connection while holding the channel lock.\nRetain it until register_netdev() has taken the parent device reference.\n\n## Affected\n\n- `Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < 390b5db3ff8745187f094c4e915663b7b1f98944`\n- `Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < 46a88784c4c9b96954dd86f747ce93f65efa1302`\n- `Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < 551ae773ec64045b4e72099132654887e0270bcc`\n- `Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < ae215c5b6422d8eda443b861b124bd1be6969c31`\n- `Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < df22adc7eafc22e651561813c11dc51a796b12ee`\n- `Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < a6b22dbd80926556290ad2243be25218d6956a19`\n- `Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < 563a8573047182f550b1e1e030615755cd8c41da`\n- `Linux >= 65f53e9802dbfae0e5758a91793c3f5f8bece49b < bb067a99a0356196c0b89a95721985485ebce5a5`\n- `Linux 3.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}