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CVE-2026-68228

Estado: RecibidaAlta (7.8)—

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

media: chips-media: wave5: Move src_buf Removal to finish_encode

During encoder processing, there is a case where the IRQ response could return the buffer back to userspace via v4l2_m2m_buf_done call. In this time, userspace could queue up this same buffer before start_encode removes the index from the ready queue. This would then lead to a case where the buffer in the ready queue could be a self loop due to the WRITE_ONCE(prev->next, new) call in __list_add.

When __list_del is finally called, the loop is already made so nothing points back to ready queue list head and pointers are poisoned.

Leer descripción completaMostrar menos

A buffer should not be marked as DONE before the buffer is removed from m2m ready queue. Move removal entirely to finish_encode.

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.

Vulnerabilidad de escalada local (AV:L, PR:L) en kernel Linux que causa corrupción de memoria y posible DoS; el acceso local permitido sugiere T1068 como explotación; los impactos incluyen negación de servicio por crash y corrupción de estructuras de datos.

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

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageFilter Network TrafficExecution PreventionEncrypt Sensitive Information

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-2026-68228",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "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
      }
    ]
  },
  "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": "9707a6254a8a6b978bde811a44fe07d86c229d1c",
              "lessThan": "1ee2b2b189ddc7b23c8eee1145de42b8bd19fb06",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9707a6254a8a6b978bde811a44fe07d86c229d1c",
              "lessThan": "f24ca8b53fe15db40957bdaa40c9aa68e1557bbe",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9707a6254a8a6b978bde811a44fe07d86c229d1c",
              "lessThan": "d681227ce43bfd74b6eb69beecd9b0bec1fd8b48",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9707a6254a8a6b978bde811a44fe07d86c229d1c",
              "lessThan": "b20157147089a9c16a38c7810e2fe6f2df8e3277",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.8",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-10T13:20:11.017",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1ee2b2b189ddc7b23c8eee1145de42b8bd19fb06",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b20157147089a9c16a38c7810e2fe6f2df8e3277",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d681227ce43bfd74b6eb69beecd9b0bec1fd8b48",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f24ca8b53fe15db40957bdaa40c9aa68e1557bbe",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: chips-media: wave5: Move src_buf Removal to finish_encode\n\nDuring encoder processing, there is a case where the IRQ response could\nreturn the buffer back to userspace via v4l2_m2m_buf_done call. In this\ntime, userspace could queue up this same buffer before start_encode removes\nthe index from the ready queue. This would then lead to a case where the\nbuffer in the ready queue could be a self loop due to the\nWRITE_ONCE(prev->next, new) call in __list_add.\n\nWhen __list_del is finally called, the loop is already made so nothing\npoints back to ready queue list head and pointers are poisoned.\n\nA buffer should not be marked as DONE before the buffer is removed from\nm2m ready queue. Move removal entirely to finish_encode."
    }
  ],
  "lastModified": "2026-08-17T05:18:25.037",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}