Vulnerability Details CVE-2026-64406
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 19.5%
CVSS Severity
CVSS v3 Score 8.0
References
- https://git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0
- https://git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614
- https://git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a
- https://git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049
- https://git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db
- https://git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547
- https://git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d
- https://git.kernel.org/stable/c/c66a95e60b65d876a927123b0ed36bd6177d9ca6
Products affected by CVE-2026-64406
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cpe:2.3:o:linux:linux_kernel:5.10.259
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cpe:2.3:o:linux:linux_kernel:5.10.260
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cpe:2.3:o:linux:linux_kernel:5.15.210
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cpe:2.3:o:linux:linux_kernel:5.15.211
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cpe:2.3:o:linux:linux_kernel:6.1.175
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cpe:2.3:o:linux:linux_kernel:6.1.176
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cpe:2.3:o:linux:linux_kernel:6.1.177
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cpe:2.3:o:linux:linux_kernel:6.12.92
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cpe:2.3:o:linux:linux_kernel:6.12.93
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cpe:2.3:o:linux:linux_kernel:6.12.94
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cpe:2.3:o:linux:linux_kernel:6.12.95
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cpe:2.3:o:linux:linux_kernel:6.18.34
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cpe:2.3:o:linux:linux_kernel:6.18.35
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cpe:2.3:o:linux:linux_kernel:6.18.36
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cpe:2.3:o:linux:linux_kernel:6.18.37
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cpe:2.3:o:linux:linux_kernel:6.18.38
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cpe:2.3:o:linux:linux_kernel:6.6.142
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cpe:2.3:o:linux:linux_kernel:6.6.143
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cpe:2.3:o:linux:linux_kernel:6.6.144
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cpe:2.3:o:linux:linux_kernel:7.0.11
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cpe:2.3:o:linux:linux_kernel:7.0.12
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cpe:2.3:o:linux:linux_kernel:7.0.13
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cpe:2.3:o:linux:linux_kernel:7.0.14
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cpe:2.3:o:linux:linux_kernel:7.1
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cpe:2.3:o:linux:linux_kernel:7.1.1
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cpe:2.3:o:linux:linux_kernel:7.1.2
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cpe:2.3:o:linux:linux_kernel:7.1.3
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cpe:2.3:o:linux:linux_kernel:7.2