SB2026081540 - Use-after-free in Linux kernel spi driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-74415)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [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]

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

The vulnerability exists due to use-after-free in the atcspi200 SPI controller driver when the driver is unbound and DMA resources are torn down while the controller is still active. A local user can trigger driver unbind conditions to cause a denial of service.

The issue occurs because DMA resources are initialized after SPI controller registration, allowing DMA transfers to be triggered during teardown.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/565bdf45125a05aa8f622f58f598283f46ba43f4
• https://git.kernel.org/stable/c/af6a34c41683067a314d2b58b39edecb2e5e4ac6