SB20260918423 - Missing Release of Resource after Effective Lifetime in Linux kernel iommu intel driver

Description

This security bulletin contains information about 1 vulnerability.

1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-90242)

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to leak an IOPF reference.

The vulnerability exists due to improper resource lifecycle management in the Intel VT-d IOMMU RID domain attachment paths when replacing a RID-level domain. A local user can replace a domain associated with a device to leak an IOPF reference.

The issue occurs when the replaced domain has an IOPF handler; the leaked reference prevents the device from being removed from the IOPF queue when released.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/143cd37ce76527ddd6f6dbac4a89bde31fb8b0dc
• https://git.kernel.org/stable/c/236dd58fabd2e951b940a6ad88b81147899ed311