In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: ISO: Fix a use-after-free of the hci_conn pointer

In iso_sock_rebind_bc(), the bis pointer is cached, then the socket lock is
dropped:
bis = iso_pi(sk)->conn->hcon;
/* Release the socket before lookups since that requires hci_dev_lock
* which shall not be acquired while holding sock_lock for proper
* ordering.
*/
release_sock(sk);
hci_dev_lock(bis->hdev);

During the unlocked window, could a concurrent close() destroy the connection
and free the bis structure, causing hci_dev_lock(bis->hdev) to access memory
after it is freed, fix this by using the hdev reference which was safely
acquired via iso_conn_get_hdev().

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00151.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
d3413703d5f8b7d1e6f514f9440ed5da1bc30796 affected < d324b8aa20bd3c3394e3647dc22491d88f3f4e7a
d3413703d5f8b7d1e6f514f9440ed5da1bc30796 affected < f50331f2a1441ec49988832c3a95f2edacc47322
Linux Linux affected
Version Status Constraints
6.19 affected —
0 unaffected < 6.19
7.0.13 unaffected ≤ 7.0.*
7.1 unaffected ≤ *

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Project Subscriptions

Vendors Products
Linux Subscribe
Linux Kernel Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/d324b8aa20bd3c3394e3647dc22491d88f3f4e7a cve-icon
https://git.kernel.org/stable/c/f50331f2a1441ec49988832c3a95f2edacc47322 cve-icon
History

Thu, 25 Jun 2026 13:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
CWE-813

Thu, 25 Jun 2026 09:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Fix a use-after-free of the hci_conn pointer In iso_sock_rebind_bc(), the bis pointer is cached, then the socket lock is dropped: bis = iso_pi(sk)->conn->hcon; /* Release the socket before lookups since that requires hci_dev_lock * which shall not be acquired while holding sock_lock for proper * ordering. */ release_sock(sk); hci_dev_lock(bis->hdev); During the unlocked window, could a concurrent close() destroy the connection and free the bis structure, causing hci_dev_lock(bis->hdev) to access memory after it is freed, fix this by using the hdev reference which was safely acquired via iso_conn_get_hdev().
Title Bluetooth: ISO: Fix a use-after-free of the hci_conn pointer
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-06-25T08:39:59.804Z

Reserved: 2026-06-09T07:44:35.395Z

Link: CVE-2026-53276

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-25T12:45:15Z

Weaknesses