SB20260625233 - Use-after-free in Linux kernel iommu driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-52952)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/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 a use-after-free in __iommu_group_set_domain_internal() when handling concurrent domain attachment and device recovery operations. A local user can trigger device reset and re-attachment sequences to cause a denial of service.

The issue arises when a device in the IOMMU group is recovering while group->domain still points to a domain that may be freed.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5474e6e17a262db45c60575c73f70210f5c7001f
• https://git.kernel.org/stable/c/8fc289e809f3eb7e36cadc4684ab6fad747a5a93