CVE-2026-64406
Bluetooth: fix UAF in bt_accept_dequeue()
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.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
July 25, 2026, 10:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64406
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Retain temporary queue-walk reference through unlink.
- Hand reference to caller on success.
- Drop reference explicitly on closed paths.
- Apply provided kernel patch.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64406.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64406 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64406
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64406 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64406 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '751de6ec671fe75ad9cf65a0638d2a06b6a5984d', 'lessThan': 'c0577c55219be42b6ea2ea8db11e85bfab6f4e8d', 'versionType': 'git'}, {'status': 'affected', 'version': '407217734835d21d4e0105ebf347860dc1806f88', 'lessThan': '96ad400d5132eb333f28f6f1e2d58f0728ca9547', 'versionType': 'git'}, {'status': 'affected', 'version': '7eebd4c2c86f573af87ff165d08a83432eb0b919', 'lessThan': '0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0', 'versionType': 'git'}, {'status': 'affected', 'version': '5d86d2f1b4d9a508c441d3e45277ae1a73cfed57', 'lessThan': 'c66a95e60b65d876a927123b0ed36bd6177d9ca6', 'versionType': 'git'}, {'status': 'affected', 'version': '87c543e2f78d0871f271df92dab98901bbd5b6f5', 'lessThan': '6303ed4bbe0095f4cc195225479bf506e010d1db', 'versionType': 'git'}, {'status': 'affected', 'version': 'added1213395071470a900cc845a042fb51882a6', 'lessThan': '26168db1ce5a9766cde021b18e590a101c056614', 'versionType': 'git'}, {'status': 'affected', 'version': 'ab1513597c6cf17cd1ad2a21e3b045421b48e022', 'lessThan': '50c662bdcd51b03033a0abed6716bfd377ba1049', 'versionType': 'git'}, {'status': 'affected', 'version': 'ab1513597c6cf17cd1ad2a21e3b045421b48e022', 'lessThan': '4bd0b274054f2679f28b70222b607bb0afc3ab9a', 'versionType': 'git'}, {'status': 'affected', 'version': 'a5ca86a6097a8b030ca3226cd300b17ed330f966', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.259', 'lessThan': '5.10.261', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.210', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.175', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.142', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.92', 'lessThan': '6.12.96', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.18.34', 'lessThan': '6.18.39', 'versionType': 'semver'}, {'status': 'affected', 'version': '7.0.11', 'lessThan': '7.1', 'versionType': 'semver'}], 'programFiles': ['net/bluetooth/af_bluetooth.c', 'net/bluetooth/l2cap_sock.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.1'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.1', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/bluetooth/af_bluetooth.c', 'net/bluetooth/l2cap_sock.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/0a98ff4e7b867f72fbb4e1237d81e9fa02ded0a0 Added Reference https://git.kernel.org/stable/c/26168db1ce5a9766cde021b18e590a101c056614 Added Reference https://git.kernel.org/stable/c/4bd0b274054f2679f28b70222b607bb0afc3ab9a Added Reference https://git.kernel.org/stable/c/50c662bdcd51b03033a0abed6716bfd377ba1049 Added Reference https://git.kernel.org/stable/c/6303ed4bbe0095f4cc195225479bf506e010d1db Added Reference https://git.kernel.org/stable/c/96ad400d5132eb333f28f6f1e2d58f0728ca9547 Added Reference https://git.kernel.org/stable/c/c0577c55219be42b6ea2ea8db11e85bfab6f4e8d Added Reference https://git.kernel.org/stable/c/c66a95e60b65d876a927123b0ed36bd6177d9ca6