Use-after-free in Linux kernel - CVE-2026-43426
Published: May 8, 2026
Vulnerability identifier: #VU130760
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43426
CWE-ID: CWE-416
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 a use-after-free in the renesas_usbhs interrupt handler when handling an interrupt during device removal. A local user can trigger device removal while an interrupt is pending to cause a denial of service.
The issue occurs in a race window after driver resources have been freed but before the driver is fully unbound.
How to mitigate CVE-2026-43426
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0b7d11fd6e742ecc0b1eca44b4f0b93140c74bae
- https://git.kernel.org/stable/c/1899edac312ef17a7234851686e8a703f56d0a84
- https://git.kernel.org/stable/c/3cbc242b88c607f55da3d0d0d336b49bf1e20412
- https://git.kernel.org/stable/c/51afaf919bbaacdd9cc9e146033ae0a743a42dd7
- https://git.kernel.org/stable/c/6287e0c01ccb818e7214f88d885ffb7c9e81b0e0
- https://git.kernel.org/stable/c/6ffe44f022c95b1b29c691d2169c5abc046f7580
- https://git.kernel.org/stable/c/9c6159d5b72d5fc265cce5da04f27d730b552e69
- https://git.kernel.org/stable/c/c7012fc73dab4829404fedeeaa8531f12ac8545f