FKIE_CVE-2026-80835

Vulnerability from fkie_nvd - Published: 2026-09-04 16:18 - Updated: 2026-09-04 16:18
Severity
Summary
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. 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14d9ee8286460a7b82f3b8610b5c7ebf4550b06b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2ecdf5c9910e20f73639bc322f0518a3439d17c0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/669d940351eda316b82e24986e2e0e057653ce7d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/843e2bdaf8deb8bc341203094dfe582e38ea4af2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bb474dcd9d0224264a27a60891f00872b879835f
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/Kconfig",
            "drivers/crypto/qcom-rng.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bb474dcd9d0224264a27a60891f00872b879835f",
              "status": "affected",
              "version": "f29cd5bb64c258f29b4c49452532481f50eb43ca",
              "versionType": "git"
            },
            {
              "lessThan": "14d9ee8286460a7b82f3b8610b5c7ebf4550b06b",
              "status": "affected",
              "version": "f29cd5bb64c258f29b4c49452532481f50eb43ca",
              "versionType": "git"
            },
            {
              "lessThan": "843e2bdaf8deb8bc341203094dfe582e38ea4af2",
              "status": "affected",
              "version": "f29cd5bb64c258f29b4c49452532481f50eb43ca",
              "versionType": "git"
            },
            {
              "lessThan": "669d940351eda316b82e24986e2e0e057653ce7d",
              "status": "affected",
              "version": "f29cd5bb64c258f29b4c49452532481f50eb43ca",
              "versionType": "git"
            },
            {
              "lessThan": "2ecdf5c9910e20f73639bc322f0518a3439d17c0",
              "status": "affected",
              "version": "f29cd5bb64c258f29b4c49452532481f50eb43ca",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/crypto/Kconfig",
            "drivers/crypto/qcom-rng.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.108",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.49",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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\u0027s actually no point in hardware RNG drivers\nimplementing the crypto_rng interface.  It\u0027s 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."
    }
  ],
  "id": "CVE-2026-80835",
  "lastModified": "2026-09-04T16:18:11.790",
  "metrics": {},
  "published": "2026-09-04T16:18:11.790",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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