SB2026061078 - Improper handling of exceptional conditions in Linux kernel platform efi

Description

This security bulletin contains information about 1 vulnerability.

1) Improper handling of exceptional conditions (CVE-ID: CVE-2026-46290)

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

CVSSv4: 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

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

The vulnerability exists due to improper exceptional-condition handling in efi_crash_gracefully_on_page_fault() when processing EFI runtime service calls that trigger page faults. A local user can trigger a page fault during an EFI runtime service call to cause a denial of service.

Only systems with buggy firmware that triggers page faults during EFI runtime calls are affected.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/088f65e206087bf903743bd18417261d7a4c9644
• https://git.kernel.org/stable/c/22b365ba1af3d8c6036b8e5112fffe80998b85a0
• https://git.kernel.org/stable/c/db155b86d1523e85941f61efd7d7ffb594cc9a29