CVE-2026-64406
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: fix UAF in bt_accept_dequeue()
bt_accept_get() takes a temporary reference before dropping the accept queue lock. bt_accept_dequeue() currently drops that reference before bt_accept_unlink(), leaving only the queue reference.
bt_accept_unlink() drops the queue reference. The subsequent sock_hold() therefore accesses freed memory if it was the final reference, as observed by KASAN during listening L2CAP socket cleanup.
Retain the temporary queue-walk reference through unlink and hand it to the caller on success. Drop it explicitly on the closed and not-yet-connected paths.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 751de6ec671fe75ad9cf65a0638d2a06b6a5984d < c0577c55219be42b6ea2ea8db11e85bfab6f4e8d | affected |
| Linux | Linux | 407217734835d21d4e0105ebf347860dc1806f88 < 96ad400d5132eb333f28f6f1e2d58f0728ca9547 | affected |
| Linux | Linux | 7eebd4c2c86f573af87ff165d08a83432eb0b919 < 0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0 | affected |
| Linux | Linux | 5d86d2f1b4d9a508c441d3e45277ae1a73cfed57 < c66a95e60b65d876a927123b0ed36bd6177d9ca6 | affected |
| Linux | Linux | 87c543e2f78d0871f271df92dab98901bbd5b6f5 < 6303ed4bbe0095f4cc195225479bf506e010d1db | affected |
| Linux | Linux | added1213395071470a900cc845a042fb51882a6 < 26168db1ce5a9766cde021b18e590a101c056614 | affected |
| Linux | Linux | ab1513597c6cf17cd1ad2a21e3b045421b48e022 < 50c662bdcd51b03033a0abed6716bfd377ba1049 | affected |
| Linux | Linux | ab1513597c6cf17cd1ad2a21e3b045421b48e022 < 4bd0b274054f2679f28b70222b607bb0afc3ab9a | affected |
| Linux | Linux | a5ca86a6097a8b030ca3226cd300b17ed330f966 | affected |
| Linux | Linux | 5.10.259 < 5.10.261 | affected |
| Linux | Linux | 5.15.210 < 5.15.212 | affected |
| Linux | Linux | 6.1.175 < 6.1.178 | affected |
| Linux | Linux | 6.6.142 < 6.6.145 | affected |
| Linux | Linux | 6.12.92 < 6.12.96 | affected |
| Linux | Linux | 6.18.34 < 6.18.39 | affected |
| Linux | Linux | 7.0.11 < 7.1 | affected |
| Linux | Linux | 7.1 | affected |
| Linux | Linux | 0 < 7.1 | unaffected |
| Linux | Linux | 5.10.261 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.212 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.178 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.145 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.96 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.39 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.4 <= 7.1.* | unaffected |
| Linux | Linux | 7.2-rc3 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d
- https://git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547
- https://git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0
- https://git.kernel.org/stable/c/c66a95e60b65d876a927123b0ed36bd6177d9ca6
- https://git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db
- https://git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614
- https://git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049
- https://git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a
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