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CVE-2026-23344

Estado: AnalizadaAlta (7.8)—

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

crypto: ccp - Fix use-after-free on error path

In the error path of sev_tsm_init_locked(), the code dereferences 't' after it has been freed with kfree(). The pr_err() statement attempts to access t->tio_en and t->tio_init_done after the memory has been released.

Move the pr_err() call before kfree(t) to access the fields while the memory is still valid.

This issue reported by Smatch static analyser

CVSS

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:L, PR:L, UI:N indica escalada local (T1068). Use-after-free (CWE-416) en kernel permite ejecución de código (T1059) con privilegios elevados.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-23344",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
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          "product": "Linux",
          "versions": [
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          "programFiles": [
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          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "version": "6.19"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.19",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver",
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              "status": "unaffected",
              "version": "7.0",
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              "lessThanOrEqual": "*"
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          "programFiles": [
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          "defaultStatus": "affected"
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  ],
  "published": "2026-03-25T11:16:32.493",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/79a26fe3175b9ed7c0c9541b197cb9786237c0f7",
      "tags": [
        "Patch"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ccp - Fix use-after-free on error path\n\nIn the error path of sev_tsm_init_locked(), the code dereferences 't'\nafter it has been freed with kfree(). The pr_err() statement attempts\nto access t->tio_en and t->tio_init_done after the memory has been\nreleased.\n\nMove the pr_err() call before kfree(t) to access the fields while the\nmemory is still valid.\n\nThis issue reported by Smatch static analyser"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncrypto: ccp - Corrección de uso después de liberación en la ruta de error\n\nEn la ruta de error de sev_tsm_init_locked(), el código desreferencia 't' después de que ha sido liberado con kfree(). La instrucción pr_err() intenta acceder a t->tio_en y t->tio_init_done después de que la memoria ha sido liberada.\n\nMover la llamada a pr_err() antes de kfree(t) para acceder a los campos mientras la memoria aún es válida.\n\nEste problema reportado por el analizador estático Smatch"
    }
  ],
  "lastModified": "2026-06-17T10:21:23.473",
  "configurations": [
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