CVE-2026-74530
Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that. Handle NULL hcon, return 0 + do nothing to match the previous behavior.
INFO
Published Date :
Aug. 15, 2026, 1:17 p.m.
Last Modified :
Aug. 15, 2026, 1:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74530
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
- Hold refcount to avoid UAF.
- Handle NULL hcon.
- Return 0 to match previous behavior.
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-2026-74530.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/2d91e6244b69d752503b2d44020d8b0e323dbd38 | |
| https://git.kernel.org/stable/c/56e78b670356caab0b607e8aad4cf819a1909d07 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74530 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-2026-74530
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-2026-74530 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74530 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
Aug. 15, 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': '024421cf39923927ab2b5fe895d1d922b9abe67f', 'lessThan': '2d91e6244b69d752503b2d44020d8b0e323dbd38', 'versionType': 'git'}, {'status': 'affected', 'version': '024421cf39923927ab2b5fe895d1d922b9abe67f', 'lessThan': '56e78b670356caab0b607e8aad4cf819a1909d07', 'versionType': 'git'}, {'status': 'affected', 'version': '620810ac1f7f1133a9ac403e132b3ad6995ddf39', 'versionType': 'git'}, {'status': 'affected', 'version': 'ee0586ad64a805eaf1a9a10100e908627a561e34', 'versionType': 'git'}, {'status': 'affected', 'version': '6.12.28', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.14.6', 'lessThan': '6.15', 'versionType': 'semver'}], 'programFiles': ['net/bluetooth/hci_sync.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/bluetooth/hci_sync.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that. Handle NULL hcon, return 0 + do nothing to match the previous behavior. Added Reference https://git.kernel.org/stable/c/2d91e6244b69d752503b2d44020d8b0e323dbd38 Added Reference https://git.kernel.org/stable/c/56e78b670356caab0b607e8aad4cf819a1909d07