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CVE-2026-80835

Estado: RecibidaSin puntuar—

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

crypto: qcom-rng - Remove crypto_rng interface

qcom-rng.c exposes the same hardware through two completely separate interfaces, crypto_rng and hwrng. However, the implementation of this is buggy because it permits generation operations from these interfaces to run concurrently with each other, accessing the same registers. That is, qcom_rng_generate() synchronizes with itself but not with qcom_hwrng_read(). This results in potential repetition of output from the RNG, output of non-random values, etc.

Fortunately, there's actually no point in hardware RNG drivers implementing the crypto_rng interface.

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It's not actually used by anything besides the "rng" algorithm type of AF_ALG, which in turn is not actually used in practice. Other crypto_rng hardware drivers are likewise being phased out, leaving just the hwrng support.

Thus, remove it to simplify the code and avoid conflict (and confusion) with the hwrng interface which is the one that actually matters.

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-2026-80835",
  "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": "f29cd5bb64c258f29b4c49452532481f50eb43ca",
              "lessThan": "bb474dcd9d0224264a27a60891f00872b879835f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f29cd5bb64c258f29b4c49452532481f50eb43ca",
              "lessThan": "14d9ee8286460a7b82f3b8610b5c7ebf4550b06b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f29cd5bb64c258f29b4c49452532481f50eb43ca",
              "lessThan": "843e2bdaf8deb8bc341203094dfe582e38ea4af2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f29cd5bb64c258f29b4c49452532481f50eb43ca",
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              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "2ecdf5c9910e20f73639bc322f0518a3439d17c0",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/crypto/Kconfig",
            "drivers/crypto/qcom-rng.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.7",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.108",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.49",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.13",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.3",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/crypto/Kconfig",
            "drivers/crypto/qcom-rng.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-04T16:18:11.790",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/14d9ee8286460a7b82f3b8610b5c7ebf4550b06b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2ecdf5c9910e20f73639bc322f0518a3439d17c0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/669d940351eda316b82e24986e2e0e057653ce7d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/843e2bdaf8deb8bc341203094dfe582e38ea4af2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bb474dcd9d0224264a27a60891f00872b879835f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qcom-rng - Remove crypto_rng interface\n\nqcom-rng.c exposes the same hardware through two completely separate\ninterfaces, crypto_rng and hwrng.  However, the implementation of this\nis buggy because it permits generation operations from these interfaces\nto run concurrently with each other, accessing the same registers.  That\nis, qcom_rng_generate() synchronizes with itself but not with\nqcom_hwrng_read().  This results in potential repetition of output from\nthe RNG, output of non-random values, etc.\n\nFortunately, there's actually no point in hardware RNG drivers\nimplementing the crypto_rng interface.  It's not actually used by\nanything besides the \"rng\" algorithm type of AF_ALG, which in turn is\nnot actually used in practice.  Other crypto_rng hardware drivers are\nlikewise being phased out, leaving just the hwrng support.\n\nThus, remove it to simplify the code and avoid conflict (and confusion)\nwith the hwrng interface which is the one that actually matters."
    }
  ],
  "lastModified": "2026-09-04T16:18:11.790",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}