Improper locking in Linux kernel - CVE-2026-53358
Published: July 2, 2026
Vulnerability identifier: #VU136811
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53358
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper locking in l2cap_sock_cleanup_listen() when cleaning up listening L2CAP channels. A local user can trigger a race condition to cause a denial of service.
The issue involves incorrect lock ordering between conn->lock, chan->lock, and sk_lock during Bluetooth L2CAP channel cleanup.
How to mitigate CVE-2026-53358
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/3634cbdc2eb414b69ffa752ddbe5e0458518e321
- https://git.kernel.org/stable/c/50dfec218808b148ab4247b1858031b7a32015c5
- https://git.kernel.org/stable/c/7555fd885a0603f50e49a655850a1f2bd8a25398
- https://git.kernel.org/stable/c/859d3ace791ed878ae9ba5522c7844d960da8f88
- https://git.kernel.org/stable/c/89dec92041717b027216e110599e4f6d6c921b79
- https://git.kernel.org/stable/c/8c8e620467a7b51562dbcefbd1f09f288d7d710d
- https://git.kernel.org/stable/c/deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9
- https://git.kernel.org/stable/c/e1c100e2d61bd8c718b7d91fe3e050780a9bf72d