Improper locking in Linux kernel - CVE-2026-64454
Published: July 27, 2026
Vulnerability identifier: #VU139484
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-64454
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper lock handling in the dwc3 gadget disconnect callback path when suspending the gadget. A local user can trigger a gadget disconnect during suspend to cause a denial of service.
The issue occurs because the disconnect callback may run in a non-sleepable context with IRQs disabled, which can trigger kernel lockdep warnings and sleeping-function-in-invalid-context failures.
Affected software
Linux kernel
How to mitigate CVE-2026-64454
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/010382937fb69892b3469ac4d30af072262f59e8
- https://git.kernel.org/stable/c/48958478cb8dbc429a5b19f36e866b63d6297d1d
- https://git.kernel.org/stable/c/5e5798880eb1533a7de6fb68eb14b2d8202ebf76
- https://git.kernel.org/stable/c/642e04f5c292d04070ae6e4374fbf14cc40a2465
- https://git.kernel.org/stable/c/b399be2958456efe1b64b19c55a54a24e9035769
- https://git.kernel.org/stable/c/c4e232bd07fe2b69a6e5c380db41dd36b95e0524
- https://git.kernel.org/stable/c/e0e4f15d4225fb7156cc0e3c21eb8953114f9b89