Type conversion in Linux kernel - CVE-2026-64349
Published: July 27, 2026
Vulnerability identifier: #VU139615
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-2026-64349
CWE-ID: CWE-704
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 access of device registers in dwc3_ulpi_setup() when configuring USB2 PHY settings. A local user can trigger the vulnerable code path to cause a denial of service.
The issue is associated with incorrect arguments passed to dwc3_readl() and dwc3_writel() in the DWC3 core driver.
Affected software
Linux kernel
Ubuntu
linux-gcp-7.0 (Ubuntu package)
Ubuntu
linux-gcp-7.0 (Ubuntu package)
How to mitigate CVE-2026-64349
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1