CVE-2026-46290

kernel: x86/efi: Fix graceful fault handling after FPU softirq changes

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Severity

Unknown

Red Hat Product Security

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CVSS

Review impact separately from score.

Published · June 8, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's x86/efi component. Due to changes in FPU softirq handling, the system incorrectly identifies normal task context as an interrupt context. This issue, when combined with buggy firmware that triggers page faults during EFI (Extensible Firmware Interface) runtime calls, can lead to an unrecoverable system hang, resulting in a Denial of Service (DoS).

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE-663 · Use of a Non-reentrant Function in a Concurrent Context