platform/x86/amd/pmc: Propagate SMU errors and validate S2D address
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().
CVE-2026-81016
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-81016
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d",
"lessThan": "85ef9d4c384c1d143c51580933674d94dba3b8d9",
"versionType": "git"
},
{
"status": "affected",
"version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d",
"lessThan": "638e1ca5d4e2b4fdbb209db64926d013b34f3b79",
"versionType": "git"
},
{
"status": "affected",
"version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d",
"lessThan": "8178f59d76570b152d836bde07f5997f15861f04",
"versionType": "git"
},
{
"status": "affected",
"version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d",
"lessThan": "775d4cde1f9737796ce7d8393521e9e8c5b49891",
"versionType": "git"
},
{
"status": "affected",
"version": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d",
"lessThan": "0225c1d637687b03726f00ac65b6def843d2c464",
"versionType": "git"
}
],
"programFiles": [
"drivers/platform/x86/amd/pmc/mp1_stb.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/platform/x86/amd/pmc/mp1_stb.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-81016
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46655 · Revision 1
- Added to Heist Feed
- Publisher date