SB20260325118 - Cryptographic Issues in Linux kernel amd amdgpu driver

Description

This security bulletin contains information about 1 vulnerability.

1) Cryptographic Issues (CVE-ID: CVE-2026-23338)

CWE-ID: CWE-310 - Cryptographic Issues

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 input validation in the drm/amdgpu/userq component when handling ioctl calls with a too small num_fences parameter. A local user can provide a specially crafted input to cause the kernel to emit warnings, leading to unnecessary logging and potential system disruption.

The attacker needs local system access and no additional privileges or user interaction beyond the ability to invoke the vulnerable ioctl.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1753f5f81ab60a553287f9ee659a6ac363adf8d7
• https://git.kernel.org/stable/c/7321302edca3a349ddaea689df95b986beee6c4a
• https://git.kernel.org/stable/c/7b7d7693a55d606d700beb9549c9f7f0e5d9c24f