Unchecked Return Value in Linux kernel - CVE-2026-81016
Published: September 12, 2026
Vulnerability identifier: #VU149380
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-81016
CWE-ID: CWE-252
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger an ioremap-on-RAM warning.
The vulnerability exists due to unchecked return values in amd_stb_s2d_init() when handling S2D SMU physical-address queries. A local user can cause physical address zero to be passed to devm_ioremap() to trigger an ioremap-on-RAM warning.
The condition is associated with the spill-to-DRAM feature's separate SMU message port.
Affected software
Linux kernel
How to mitigate CVE-2026-81016
Install security update from vendor's repository.