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.
Affected versions
Linux kernel versions
5.10.259,
5.15.210,
6.1.175,
6.6.142,
6.12.92,
6.18.34,
7.0.11,
7.1
and later are affected. Fixed in
5.10.261,
5.15.212,
6.1.178,
6.6.145,
6.12.96,
6.18.39,
7.1.4,
7.2-rc3
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-64406?
CVE-2026-64406 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.10.259 onward and has been patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-64406 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-64406?
Yes. CVE-2026-64406 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 5.10.259 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-64406 actively exploited?
No. CVE-2026-64406 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.