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CVE-2026-93097

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

cxl/mbox: Break poison list loop on an empty payload

A device that returns count == 0 with CXL_POISON_FLAG_MORE set on every iteration never advances nr_records, so the max_errors guard never trips and the do/while loops forever while holding poison.mutex. That hangs the sysfs-triggered scan thread and blocks all subsequent poison operations on the device. The existing "Protect against an uncleared _FLAG_MORE" guard was intended to bound a misbehaving device but does not cover the count == 0 case.

Stop the loop on an empty payload so a malfunctioning or malicious device cannot wedge the poison scan.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-93097",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
              "lessThan": "86771c105293ca26bfcc320b4f60d32c137b54aa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
              "lessThan": "42eab80981f4d2ac820e253e80ecf92f8cd91f69",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
              "lessThan": "6ad491cef1a812cf7b53aa769cd8869516c47362",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
              "lessThan": "e77594e0cea67ab1c2317a27aa77a744e26ad6a6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
              "lessThan": "8b301c4afbce4bc3f94528441d8d5ce1366504ad",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/cxl/core/mbox.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.4",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/cxl/core/mbox.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:18:03.843",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/42eab80981f4d2ac820e253e80ecf92f8cd91f69",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6ad491cef1a812cf7b53aa769cd8869516c47362",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/86771c105293ca26bfcc320b4f60d32c137b54aa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8b301c4afbce4bc3f94528441d8d5ce1366504ad",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e77594e0cea67ab1c2317a27aa77a744e26ad6a6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/mbox: Break poison list loop on an empty payload\n\nA device that returns count == 0 with CXL_POISON_FLAG_MORE set on every\niteration never advances nr_records, so the max_errors guard never\ntrips and the do/while loops forever while holding poison.mutex. That\nhangs the sysfs-triggered scan thread and blocks all subsequent poison\noperations on the device. The existing \"Protect against an uncleared\n_FLAG_MORE\" guard was intended to bound a misbehaving device but does\nnot cover the count == 0 case.\n\nStop the loop on an empty payload so a malfunctioning or malicious\ndevice cannot wedge the poison scan."
    }
  ],
  "lastModified": "2026-09-17T17:18:03.843",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}