« Volver al listado

CVE-2026-80623

Estado: RecibidaSin puntuar—

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

coresight: ete: Always save state on power down

System register ETMs and ETE are unlikely to be preserved on CPU power down. The ETE DT binding also never documented "arm,coresight-loses-context-with-cpu" so nobody would have legitimately been able to use that binding to fix it and ACPI has no such binding at all.

Fix it by hard coding the setting for sysreg ETMs (ETE is always sysreg) or ACPI boots. Use a local variable when setting up save_state so that it's immune to concurrent probing when devices have different configurations which is an issue with modifying the global.

Leer descripción completaMostrar menos

This fixes the following error when using Coresight with ACPI on the FVP which supports CPU PM:

Detalles técnicos trazas, registros y código del informe original
  coresight ete0: External agent took claim tag
  WARNING: drivers/hwtracing/coresight/coresight-core.c:248 at coresight_disclaim_device_unlocked+0xe0/0xe8, CPU#0: perf/117

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)

Mostrar
{
  "id": "CVE-2026-80623",
  "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": "35e1c9163e025855f23a68f2470c471509e5d779",
              "lessThan": "65d87f28daec31903fc39fee0744f7a0059c19f2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "35e1c9163e025855f23a68f2470c471509e5d779",
              "lessThan": "293dacd5b6a9f1275d92ca6c4fd874e54b2c8319",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "35e1c9163e025855f23a68f2470c471509e5d779",
              "lessThan": "2ab4645fe4206c142a5f1491e191c906279686cf",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-etm4x-core.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.13",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/hwtracing/coresight/coresight-etm4x-core.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-28T08:16:46.447",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/293dacd5b6a9f1275d92ca6c4fd874e54b2c8319",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2ab4645fe4206c142a5f1491e191c906279686cf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/65d87f28daec31903fc39fee0744f7a0059c19f2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ete: Always save state on power down\n\nSystem register ETMs and ETE are unlikely to be preserved on CPU power\ndown. The ETE DT binding also never documented\n\"arm,coresight-loses-context-with-cpu\" so nobody would have legitimately\nbeen able to use that binding to fix it and ACPI has no such binding at\nall.\n\nFix it by hard coding the setting for sysreg ETMs (ETE is always sysreg)\nor ACPI boots. Use a local variable when setting up save_state so that\nit's immune to concurrent probing when devices have different\nconfigurations which is an issue with modifying the global.\n\nThis fixes the following error when using Coresight with ACPI on the FVP\nwhich supports CPU PM:\n\n  coresight ete0: External agent took claim tag\n  WARNING: drivers/hwtracing/coresight/coresight-core.c:248 at coresight_disclaim_device_unlocked+0xe0/0xe8, CPU#0: perf/117"
    }
  ],
  "lastModified": "2026-08-28T08:16:46.447",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}