SB20260812278 - Integer overflow in Linux kernel amd amdkfd driver

Description

This security bulletin contains information about 1 vulnerability.

1) Integer overflow (CVE-ID: CVE-2026-68257)

CWE-ID: CWE-190 - Integer overflow

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 an integer overflow in drm/amdkfd queue buffer handling in kfd_queue_acquire_buffers() and kfd_queue_release_buffers() when calculating the CWSR save area size. A local user can provide crafted queue properties with large ctx_save_restore_area_size values to cause a denial of service.

The issue can result in an undersized CWSR save area that firmware later overruns.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2b0386d4293920e690c0e017708f999b93cc729b
• https://git.kernel.org/stable/c/865532d54eb57b660b1cb1b0e1755776ce21b849
• https://git.kernel.org/stable/c/abce3276c57e36c955627307469b9f009057a467
• https://git.kernel.org/stable/c/b88ffe6593607364a8c06a48c6f29e55437cdf8e