CVE-2026-64406 Details
Description
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.
A use-after-free vulnerability has been identified in the Bluetooth implementation of the Linux kernel, specifically within the L2CAP socket management. This issue arises in the 'bt_accept_dequeue()' function, which improperly manages socket references, leading to the potential access of freed memory. The flaw was detected by KASAN during the cleanup of listening L2CAP sockets. The vulnerability affects several versions of the Linux kernel.
Users can upgrade to the latest stable version of the Linux kernel, where this vulnerability has been addressed. Instructions for downloading the latest version can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a | kernel.org | Patch |
| https://git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db | kernel.org | Patch |
| https://git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d | kernel.org | Patch |
| https://git.kernel.org/stable/c/c66a95e60b65d876a927123b0ed36bd6177d9ca6 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.10.259, < 5.10.261 >= 5.15.210, < 5.15.212 >= 6.1.175, < 6.1.178 >= 6.6.142, < 6.6.145 >= 6.12.92, < 6.12.96 >= 6.18.34, < 6.18.39 >= 7.0.11, < 7.1 >= 7.1.1, < 7.1.4 7.1 - 7.1 rc5 7.1 rc6 7.1 rc7 7.2 rc1 7.2 rc2 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 4, 2026 | Initial Analysis | [email protected] |
| Aug 17, 2026 | CVE Modified | kernel.org |
| Jul 27, 2026 | CVE Modified | kernel.org |
| Jul 25, 2026 | New CVE Received | kernel.org |