SB20260626177 - Out-of-bounds write in Linux kernel accel ethosu driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2026-53173)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/c0837b9cf6eabbad8b8cbddaff1a46a6d0a2e29d
• https://git.kernel.org/stable/c/db6cb3e35cebf487f9a78ebd4cfa4b83708ff40d