Race condition in Linux kernel - CVE-2026-43255
Published: May 7, 2026
Vulnerability identifier: #VU130453
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43255
CWE-ID: CWE-362
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 synchronization in usb_tx_block when submitting a USB request block during rapid firmware loading. A local user can trigger repeated transmission requests to cause a denial of service.
How to mitigate CVE-2026-43255
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2902a9b4415a6bafc9b1e5dd360f065d757a0bb7
- https://git.kernel.org/stable/c/3308c7504e093b22e91a4468470309cee2e26b83
- https://git.kernel.org/stable/c/498525d8358d6d20918787e59736d5b6a021e9fd
- https://git.kernel.org/stable/c/5bfb25495e391a1be0db94b15715174fa06b93a1
- https://git.kernel.org/stable/c/948a39c95d0f8d73722910f8cdb7b6e3e9206232
- https://git.kernel.org/stable/c/b82073564373e68c6ae3a96039fae14cd002a496
- https://git.kernel.org/stable/c/d66676e6ca96bf8680f869a9bd6573b26c634622
- https://git.kernel.org/stable/c/fc188b44547dea4e7350833171982a6312befde9