GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-80835 (GCVE-0-2026-80835)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:54 – Updated: 2026-09-04 15:54
VLAI
Title
crypto: qcom-rng - Remove crypto_rng interface
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f29cd5bb64c258f29b4c49452532481f50eb43ca , < bb474dcd9d0224264a27a60891f00872b879835f (git)
Affected: f29cd5bb64c258f29b4c49452532481f50eb43ca , < 14d9ee8286460a7b82f3b8610b5c7ebf4550b06b (git)
Affected: f29cd5bb64c258f29b4c49452532481f50eb43ca , < 843e2bdaf8deb8bc341203094dfe582e38ea4af2 (git)
Affected: f29cd5bb64c258f29b4c49452532481f50eb43ca , < 669d940351eda316b82e24986e2e0e057653ce7d (git)
Affected: f29cd5bb64c258f29b4c49452532481f50eb43ca , < 2ecdf5c9910e20f73639bc322f0518a3439d17c0 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.108 , ≤ 6.12.* (semver)
Unaffected: 6.18.49 , ≤ 6.18.* (semver)
Unaffected: 7.1.13 , ≤ 7.1.* (semver)
Unaffected: 7.2.3 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.108",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.49",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.13",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.3",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:54:44.116Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/bb474dcd9d0224264a27a60891f00872b879835f"
        },
        {
          "url": "https://git.kernel.org/stable/c/14d9ee8286460a7b82f3b8610b5c7ebf4550b06b"
        },
        {
          "url": "https://git.kernel.org/stable/c/843e2bdaf8deb8bc341203094dfe582e38ea4af2"
        },
        {
          "url": "https://git.kernel.org/stable/c/669d940351eda316b82e24986e2e0e057653ce7d"
        },
        {
          "url": "https://git.kernel.org/stable/c/2ecdf5c9910e20f73639bc322f0518a3439d17c0"
        }
      ],
      "title": "crypto: qcom-rng - Remove crypto_rng interface",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80835",
    "datePublished": "2026-09-04T15:54:44.116Z",
    "dateReserved": "2026-08-26T14:34:25.796Z",
    "dateUpdated": "2026-09-04T15:54:44.116Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-80835",
      "date": "2026-09-14",
      "epss": "0.00168",
      "percentile": "0.06391"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80835\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-04T16:18:11.790\",\"lastModified\":\"2026-09-04T16:18:11.790\",\"vulnStatus\":\"Received\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/crypto/Kconfig\",\"drivers/crypto/qcom-rng.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"lessThan\":\"669d940351eda316b82e24986e2e0e057653ce7d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f29cd5bb64c258f29b4c49452532481f50eb43ca\",\"lessThan\":\"2ecdf5c9910e20f73639bc322f0518a3439d17c0\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/crypto/Kconfig\",\"drivers/crypto/qcom-rng.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.108\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.49\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.13\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.3\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"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\"},{\"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\"}]}}",
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-10T01:50:57Z",
      "cve": "CVE-2026-80835",
      "id": "CVE-2026-80835",
      "initial_release_date": "2026-09-05T00:26:30Z",
      "product_status:known_affected": "17",
      "product_status:known_not_affected": "324",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80835",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80835.json",
      "version": "5"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.