SB2026081656 - Use-after-free in Linux kernel accel amdxdna driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-72328)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to a use-after-free in the amdxdna umap handling in aie2_populate_range() when racing concurrent memory mapping operations with object release. A local user can trigger concurrent operations to reuse a released amdxdna_umap object and execute arbitrary code.

The issue occurs because a reference may be acquired for an amdxdna_umap while release is already in progress.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/14f172eff9c19f8043a9858845f33cd034f3a41e
• https://git.kernel.org/stable/c/267809e2c56fbea486f7250c8a4acddcc3c54dc5
• https://git.kernel.org/stable/c/91e8109ecffb925b6202d2737384df285b195bfb