{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d"
            },
            {
              "fixed": "8178f59d76570b152d836bde07f5997f15861f04"
            },
            {
              "fixed": "775d4cde1f9737796ce7d8393521e9e8c5b49891"
            },
            {
              "fixed": "0225c1d637687b03726f00ac65b6def843d2c464"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.18.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81016.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86/amd/pmc: Propagate SMU errors and validate S2D address\n\namd_stb_s2d_init() discards the return value of several S2D SMU commands.\nWhen the SMU refuses a command (e.g. \"SMU cmd failed. err: 0xff\") the\nfailure is only noticed indirectly - if at all - and reported as -EIO,\nmasking the real error.\n\nMore seriously, the S2D_PHYS_ADDR_LOW/HIGH return values are ignored, so\non failure phys_addr_low/hi are left uninitialised and the assembled\naddress is passed straight to devm_ioremap().  When the SMU leaves them at\nzero this maps physical address 0 and trips the ioremap-on-RAM warning:\n\n  amd_pmc AMDI000B:00: SMU cmd failed. err: 0xff\n  ioremap on RAM at 0x0000000000000000 - 0x0000000000ffffff\n  WARNING: CPU: 13 PID: 4592 at arch/x86/mm/ioremap.c:...\n\nCheck the return value of each SMU command and propagate it, and reject a\nzero physical address before calling devm_ioremap().",
  "id": "CVE-2026-81016",
  "modified": "2026-09-15T03:30:23.063394162Z",
  "published": "2026-09-11T19:43:04.740Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0225c1d637687b03726f00ac65b6def843d2c464"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/775d4cde1f9737796ce7d8393521e9e8c5b49891"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8178f59d76570b152d836bde07f5997f15861f04"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81016.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81016"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "platform/x86/amd/pmc: Propagate SMU errors and validate S2D address"
}