{"id":"CVE-2023-54214","title":"Bluetooth: L2CAP: Fix potential user-after-free","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix potential user-after-free\n\nThis fixes all instances of which requires to allocate a buffer calling\nalloc_skb which may release the chan lock and r…","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 >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < b2fde8cb2a25125111f2144604e0e7c0ebcc4bba","Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < a6a7d1541fefddf7ca0cfb34c1bff63ff809cc49","Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < 60aaccf16d1e099c16bebfb96428ae762cb528f7","Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < b8ed41cc04fb74005aa51d17865ca3d022760335","Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < 31a288a4df7f6a28e65da22a4ab2add4a963738e","Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < 64e28ecf44e46de9f01915a4146706a21c3469d2","Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < 994e3e18908f5c4a12d07b44018e6aa85f071048","Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < df5703348813235874d851934e957c3723d71644","Linux 3.5"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:39:26.318408Z"},"published":"2025-12-30","updated":"2026-10-15","sourceUpdated":"2026-10-15T21:41:41.834Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-54214","references":[{"url":"https://git.kernel.org/stable/c/b2fde8cb2a25125111f2144604e0e7c0ebcc4bba"},{"url":"https://git.kernel.org/stable/c/a6a7d1541fefddf7ca0cfb34c1bff63ff809cc49"},{"url":"https://git.kernel.org/stable/c/60aaccf16d1e099c16bebfb96428ae762cb528f7"},{"url":"https://git.kernel.org/stable/c/b8ed41cc04fb74005aa51d17865ca3d022760335"},{"url":"https://git.kernel.org/stable/c/31a288a4df7f6a28e65da22a4ab2add4a963738e"},{"url":"https://git.kernel.org/stable/c/64e28ecf44e46de9f01915a4146706a21c3469d2"},{"url":"https://git.kernel.org/stable/c/994e3e18908f5c4a12d07b44018e6aa85f071048"},{"url":"https://git.kernel.org/stable/c/df5703348813235874d851934e957c3723d71644"}],"tags":["cve.org"],"epss":0.003,"epssPercentile":0.21141,"ingestedAt":"2026-10-15T22:48:25.433Z","slug":"CVE-2023-54214","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix potential user-after-free\n\nThis fixes all instances of which requires to allocate a buffer calling\nalloc_skb which may release the chan lock and reacquire later which\nmakes it possible that the chan is disconnected in the meantime.\n\n## Affected\n\n- `Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < b2fde8cb2a25125111f2144604e0e7c0ebcc4bba`\n- `Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < a6a7d1541fefddf7ca0cfb34c1bff63ff809cc49`\n- `Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < 60aaccf16d1e099c16bebfb96428ae762cb528f7`\n- `Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < b8ed41cc04fb74005aa51d17865ca3d022760335`\n- `Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < 31a288a4df7f6a28e65da22a4ab2add4a963738e`\n- `Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < 64e28ecf44e46de9f01915a4146706a21c3469d2`\n- `Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < 994e3e18908f5c4a12d07b44018e6aa85f071048`\n- `Linux >= a6a5568c03c4805d4d250f6bd9d468eeeb4ea059 < df5703348813235874d851934e957c3723d71644`\n- `Linux 3.5`\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":[]}