SB20260529109 - Always-Incorrect Control Flow Implementation in Linux kernel spi driver

Description

This security bulletin contains information about 1 vulnerability.

1) Always-Incorrect Control Flow Implementation (CVE-ID: CVE-2026-46192)

CWE-ID: CWE-670 - Always-Incorrect Control Flow Implementation

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 state management in microchip-core-qspi when handling emulated read-only dual/quad operations. A local user can trigger a crafted QSPI read operation to cause a denial of service.

The issue can brick the transfer because the driver attempts to transmit garbage data during read handling.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/67184f361ab4d9fac6d2b8d5fed6649d496038a4
• https://git.kernel.org/stable/c/eb56deaabf127e8985fc91fa6c97bf8a3b062844
• https://git.kernel.org/stable/c/ec9d0ddbde6003c303fa5e1d5cd48952852984d8