Out-of-bounds read in Linux kernel - CVE-2026-31470
Published: April 24, 2026
Vulnerability identifier: #VU127677
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31470
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 disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in the tdx guest quote handling logic when copying a host-controlled quote buffer to guest userspace. A local user can trigger quote retrieval to disclose sensitive information.
The leak may cross container protection boundaries in deployments exposing per-container configs-tsm-report interfaces.
How to mitigate CVE-2026-31470
Install security update from vendor's repository.