SB20260424287 - Improper resource shutdown or release in Linux kernel dma idxd driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-31440)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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 resource shutdown or release in the idxd dmaengine driver when removing a device after a reset. A local user can trigger device removal to cause a denial of service.

The issue occurs because the reset clears configuration registers before event log memory deallocation is checked.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/9dfa00967e6ef43a9dd0887fe5c3a721a39da92e
• https://git.kernel.org/stable/c/d94f9b0ba28a205caf95902ee88b42bdb8af83d0
• https://git.kernel.org/stable/c/ee66bc29578391c9b48523dc9119af67bd5c7c0f
• https://git.kernel.org/stable/c/facd0012708e942fc12890708738aebde497564e