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

Vulnerability from cvelistv5 – Published: 2026-08-15 05:53 – Updated: 2026-08-17 05:40
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
Assigner
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.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cea03d67db3a880893360bdbb1b0b8d9b33b1799",
              "status": "affected",
              "version": "e3704ce5d7156ee837461be99841f312c64700b0",
              "versionType": "git"
            },
            {
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          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.18.16",
                  "vulnerable": true
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                },
                {
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                  "versionStartIncluding": "6.19.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: ISST: Restore SST-PP control to all domains\n\nThe SST-PP control offset is only restored to power domain 0 after\nresume. During suspend, control values are read and stored for all\npower domains.\n\nUse pd_info-\u003esst_base instead of power_domain_info-\u003esst_base, which\nonly points to power domain 0 base address."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "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"
        }
      ],
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        "engine": "bippy-1.2.0"
      }
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  },
  "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": "2026-08-17T05:40:51.234Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-72143",
      "date": "2026-09-15",
      "epss": "0.00157",
      "percentile": "0.05263"
    },
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-19T05:26:02+00:00",
      "cve": "CVE-2026-72143",
      "id": "CVE-2026-72143",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: platform/x86: ISST: Restore SST-PP control to all domains",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72143.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T13:30:16Z",
      "cve": "CVE-2026-72143",
      "id": "CVE-2026-72143",
      "initial_release_date": "2026-08-31T13:30:16Z",
      "product_status:known_not_affected": "362",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-72143",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-72143.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.