Answer in brief
CVE-2026-81016 records a High severity (CVSS 7.7) vulnerability in platform/x86/amd/pmc: Propagate SMU errors and validate S2D address. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <8178f59d76570b152d836bde07f5997f15861f04 || >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <775d4cde1f9737796ce7d8393521e9e8c5b49891 || >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <0225c1d637687b03726f00ac65b6def843d2c464 | 8178f59d76570b152d836bde07f5997f15861f04, 775d4cde1f9737796ce7d8393521e9e8c5b49891, 0225c1d637687b03726f00ac65b6def843d2c464 |
| Linux/Linuxgeneric | >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <638e1ca5d4e2b4fdbb209db64926d013b34f3b79 || >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <8178f59d76570b152d836bde07f5997f15861f04 || >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <775d4cde1f9737796ce7d8393521e9e8c5b49891 || >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <0225c1d637687b03726f00ac65b6def843d2c464 | 638e1ca5d4e2b4fdbb209db64926d013b34f3b79, 8178f59d76570b152d836bde07f5997f15861f04, 775d4cde1f9737796ce7d8393521e9e8c5b49891, 0225c1d637687b03726f00ac65b6def843d2c464 |
| Linux/Linuxgeneric | 5.18 | Not reported |
| Linux/Linuxgeneric | >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <85ef9d4c384c1d143c51580933674d94dba3b8d9 || >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <638e1ca5d4e2b4fdbb209db64926d013b34f3b79 || >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <8178f59d76570b152d836bde07f5997f15861f04 || >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <775d4cde1f9737796ce7d8393521e9e8c5b49891 || >=3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d <0225c1d637687b03726f00ac65b6def843d2c464 | 85ef9d4c384c1d143c51580933674d94dba3b8d9, 638e1ca5d4e2b4fdbb209db64926d013b34f3b79, 8178f59d76570b152d836bde07f5997f15861f04, 775d4cde1f9737796ce7d8393521e9e8c5b49891, 0225c1d637687b03726f00ac65b6def843d2c464 |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: platform/x86/amd/pmc: Propagate SMU errors and validate S2D address amd_stb_s2d_init() discards the return value of several S2D SMU commands. When the SMU refuses a command (e.g. "SMU cmd failed. err: 0xff") the failure is only noticed indirectly - if at all - and reported as -EIO, masking the real error. More seriously, the S2D_PHYS_ADDR_LOW/HIGH return values are ignored, so on failure phys_addr_low/hi are left uninitialised and the assembled address is passed straight to devm_ioremap(). When the SMU leaves them at zero this maps physical address 0 and trips the ioremap-on-RAM warning: amd_pmc AMDI000B:00: SMU cmd failed. err: 0xff ioremap on RAM at 0x0000000000000000 - 0x0000000000ffffff WARNING: CPU: 13 PID: 4592 at arch/x86/mm/ioremap.c:... Check the return value of each SMU command and propagate it, and reject a zero physical address before calling devm_ioremap().
Quoted source text, attributed separately from HOL analysis.