{"id":"CVE-2026-64406","summary":"Bluetooth: fix UAF in bt_accept_dequeue()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix UAF in bt_accept_dequeue()\n\nbt_accept_get() takes a temporary reference before dropping the accept\nqueue lock. bt_accept_dequeue() currently drops that reference before\nbt_accept_unlink(), leaving only the queue reference.\n\nbt_accept_unlink() drops the queue reference. The subsequent\nsock_hold() therefore accesses freed memory if it was the final\nreference, as observed by KASAN during listening L2CAP socket cleanup.\n\nRetain the temporary queue-walk reference through unlink and hand it to\nthe caller on success. Drop it explicitly on the closed and\nnot-yet-connected paths.","modified":"2026-08-18T03:30:51.911992982Z","published":"2026-07-25T08:50:47.978Z","related":["openSUSE-SU-2026:11476-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64406.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db"},{"type":"WEB","url":"https://git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c66a95e60b65d876a927123b0ed36bd6177d9ca6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64406.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64406"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"751de6ec671fe75ad9cf65a0638d2a06b6a5984d"},{"fixed":"c0577c55219be42b6ea2ea8db11e85bfab6f4e8d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"407217734835d21d4e0105ebf347860dc1806f88"},{"fixed":"96ad400d5132eb333f28f6f1e2d58f0728ca9547"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7eebd4c2c86f573af87ff165d08a83432eb0b919"},{"fixed":"0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5d86d2f1b4d9a508c441d3e45277ae1a73cfed57"},{"fixed":"c66a95e60b65d876a927123b0ed36bd6177d9ca6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"87c543e2f78d0871f271df92dab98901bbd5b6f5"},{"fixed":"6303ed4bbe0095f4cc195225479bf506e010d1db"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"added1213395071470a900cc845a042fb51882a6"},{"fixed":"26168db1ce5a9766cde021b18e590a101c056614"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ab1513597c6cf17cd1ad2a21e3b045421b48e022"},{"fixed":"50c662bdcd51b03033a0abed6716bfd377ba1049"},{"fixed":"4bd0b274054f2679f28b70222b607bb0afc3ab9a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"a5ca86a6097a8b030ca3226cd300b17ed330f966"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.259"},{"fixed":"5.10.261"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.210"},{"fixed":"5.15.212"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.1.175"},{"fixed":"6.1.178"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.6.142"},{"fixed":"6.6.145"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.12.92"},{"fixed":"6.12.96"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.18.34"},{"fixed":"6.18.39"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7.0.11"},{"fixed":"7.1"}]}],"versions":["v5.10.260","v5.10.259","v5.15.211","v5.15.210","v6.1.177","v6.1.176","v6.1.175","v6.6.144","v6.6.143","v6.6.142","v6.12.95","v6.12.94","v6.12.93","v6.12.92","v6.18.38","v6.18.37","v6.18.36","v6.18.35","v6.18.34","v7.0.10","v7.0.9","v7.0","v7.0.8","v7.0.7","v7.0.6","v7.0.5","v7.0.4","v7.0.3","v7.0-rc1","v7.0.2","v7.0.1","v7.0-rc5","v7.0-rc6","v7.0-rc7","v7.0-rc3","v7.0-rc4","v6.19-rc2","v7.0-rc2","v6.19","v6.19-rc8","v6.19-rc1","v6.19-rc6","v6.19-rc7","v6.19-rc5","v6.19-rc4","v6.19-rc3","v6.18","v6.18-rc1","v6.18-rc7","v6.18-rc3","v6.18-rc5","v6.18-rc6","v6.18-rc2","v6.18-rc4","v6.17","v6.17-rc7","v6.17-rc1","v6.17-rc2","v6.17-rc6","v6.17-rc4","v6.17-rc5","v6.17-rc3","v6.16","v6.16-rc6","v6.16-rc1","v6.16-rc4","v6.16-rc2","v6.16-rc5","v6.16-rc7","v6.16-rc3","v6.14-rc3","v6.15","v6.15-rc1","v6.15-rc6","v6.15-rc3","v6.15-rc2","v6.15-rc7","v6.15-rc4","v6.15-rc5","v6.14","v6.14-rc1"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