Out-of-bounds read in Linux kernel - CVE-2026-64081
Published: July 20, 2026
Vulnerability identifier: #VU138562
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-64081
CWE-ID: CWE-125
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 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.
How to mitigate CVE-2026-64081
Install security update from vendor's repository.