CVE Database›Document archive›CVE-2021-47227

CVE-2021-47227

kernel: x86/fpu: Prevent state corruption in __fpu__restore_sig()

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 21, 2024

Updated · November 21, 2025

Description

A vulnerability was found in the Linux kernel's x86/fpu, within the __fpu__restore_sig() function. When user data is copied into the kernel buffer without proper validation, it can lead to corruption of the kernel's state, resulting in a system crash when using the FPU.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-20 · Improper Input Validation