Out-of-bounds write in Linux kernel - CVE-2026-53173
Published: June 26, 2026
Vulnerability identifier: #VU135617
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53173
CWE-ID: CWE-787
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 memory corruption.
The vulnerability exists due to an out-of-bounds write in ethosu_gem_cmdstream_copy_and_validate() when parsing a crafted command stream through the ioctl interface. A local user can supply crafted buffer contents and a size value to trigger the out-of-bounds write and cause memory corruption.
The issue occurs when a 64-bit command word is encountered at the end of the allocated command buffer.
How to mitigate CVE-2026-53173
Install security update from vendor's repository.