SB20260720154 - Out-of-bounds read in Linux kernel firmware arm_ffa driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-64081)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in the arm ffa framework notification handler when processing malformed framework notification messages from the shared RX buffer. A local user can provide a crafted notification message to cause a denial of service.

The issue involves validation of the indirect message offset and size fields, including rejection of zero-length payloads and invalid non-header payload alignment.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3c51d99449dc5a01c08a7fce6071d6721f5aac83
• https://git.kernel.org/stable/c/4a1cc9e96b311d2609a6f963a5e35bd4ae730d97
• https://git.kernel.org/stable/c/76eb90e2b03de147e12ab68ea8afd8ea0342df0a