CVE-2026-72143 (GCVE-0-2026-72143)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:53 – Updated: 2026-10-16 18:44
VLAI
Title
platform/x86: ISST: Restore SST-PP control to all domains
Summary
In the Linux kernel, the following vulnerability has been resolved: platform/x86: ISST: Restore SST-PP control to all domains The SST-PP control offset is only restored to power domain 0 after resume. During suspend, control values are read and stored for all power domains. Use pd_info->sst_base instead of power_domain_info->sst_base, which only points to power domain 0 base address.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 18:42 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6992 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e3704ce5d7156ee837461be99841f312c64700b0 , < cea03d67db3a880893360bdbb1b0b8d9b33b1799 (git)
Affected: dc7901b5a1563a9c9eb29b3b0b0dac3162065cd8 , < 2a42f651cce91e9cbe65fe933622c522cbb1868b (git)
Affected: dc7901b5a1563a9c9eb29b3b0b0dac3162065cd8 , < 2565a28cdcdcb035e151d285efcba26bccb3726e (git)
Affected: 2624f3bf45a830cb3b8c8b967b23a72139700562 (git)
Affected: 6.18.16 , < 6.18.40 (semver)
Affected: 6.19.6 , < 6.20 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 7.0
Unaffected: 0 , < 7.0 (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                {
                  "lang": "en",
                  "value": "AV:L - The flawed writeq runs only in the ISST TPMI driver PM resume callback (intel_sst_resume -\u003e tpmi_sst_dev_resume) after a local suspend-to-RAM cycle, not from any network packet handler or remote service.\nAC:L - Once a multi-domain SST-TPMI system completes S3 suspend, resume deterministically executes the wrong MMIO restore for every power domain above zero with no races or attacker-dependent timing.\nPR:L - Reaching the buggy resume handler requires only initiating a system suspend (e.g., writing mem to /sys/power/state, which lacks a CAP_SYS_ADMIN check, or polkit-permitted local suspend); user namespaces cannot grant ISST ioctl writes but can still allow this PM path.\nUI:N - Exploitation does not require a victim to open files, mount filesystems, or take any other interactive action beyond the attacker (or system policy) triggering suspend and automatic resume.\nS:U - Impact is confined to corrupting SST-PP hardware configuration and host stability on the same machine; it does not cross a VM, container, or IOMMU security boundary to another authority.\nC:N - The bug performs MMIO writeq operations to hardware registers only; it does not read kernel memory, leak pointers, or expose data to userspace.\nI:H - Each incorrect resume writes a full 64-bit SST-PP control value to the wrong hardware MMIO address, corrupting platform power/performance configuration; values can be attacker-influenced via prior CAP_SYS_ADMIN ISST perf-level changes before suspend.\nA:H - Misdirected MMIO writes can panic or hang the host, and unrestored or corrupted SST-PP settings on additional power domains can destabilize multi-die Xeon systems after every affected resume cycle."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-17T05:40:51.234Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/cea03d67db3a880893360bdbb1b0b8d9b33b1799"
            },
            {
              "url": "https://git.kernel.org/stable/c/2a42f651cce91e9cbe65fe933622c522cbb1868b"
            },
            {
              "url": "https://git.kernel.org/stable/c/2565a28cdcdcb035e151d285efcba26bccb3726e"
            }
          ],
          "title": "platform/x86: ISST: Restore SST-PP control to all domains",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2026-72143",
        "datePublished": "2026-08-15T05:53:16.241Z",
        "dateReserved": "2026-08-09T03:40:39.908Z",
        "dateUpdated": "2026-10-16T18:44:58.966Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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