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FKIE_CVE-2026-93163

Vulnerability from fkie_nvd - Published: 2026-09-17 17:18 - Updated: 2026-09-17 17:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: hwrng: core - fix rng list on registration error hwrng_register(rng) does the following: 1. Checks if rng has name and read methods set 2. Checks if the name already exists 3. Adds rng to global rng_list 4. May try to set rng to current_rng If step 4 fails, it returns an error. However, it does not remove the rng from rng_list, causing a dangling reference which can result in use-after-free if the caller frees rng, since registration failed. Add a list_del_init() cleanup step.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a5834db2b1ce25649f330e78efe1ccde78967fd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bee8d1fcdc8f389b595b0a4cf6fe8440f499458a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf293c9c7424de0d04b51367d07f40570ce80231
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de4f1bcb61a73cc896decdbd27d61a34add93b53
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/hw_random/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "de4f1bcb61a73cc896decdbd27d61a34add93b53",
              "status": "affected",
              "version": "2bbb6983887fefc8026beab01198d30f47b7bd22",
              "versionType": "git"
            },
            {
              "lessThan": "cf293c9c7424de0d04b51367d07f40570ce80231",
              "status": "affected",
              "version": "2bbb6983887fefc8026beab01198d30f47b7bd22",
              "versionType": "git"
            },
            {
              "lessThan": "bee8d1fcdc8f389b595b0a4cf6fe8440f499458a",
              "status": "affected",
              "version": "2bbb6983887fefc8026beab01198d30f47b7bd22",
              "versionType": "git"
            },
            {
              "lessThan": "3a5834db2b1ce25649f330e78efe1ccde78967fd",
              "status": "affected",
              "version": "2bbb6983887fefc8026beab01198d30f47b7bd22",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "42802952a2725f85f7e36ee3b29593af5fe87197",
              "versionType": "git"
            },
            {
              "lessThan": "4.10",
              "status": "affected",
              "version": "4.9.320",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/char/hw_random/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.14"
            },
            {
              "lessThan": "4.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "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\nhwrng: core - fix rng list on registration error\n\nhwrng_register(rng) does the following:\n\n1. Checks if rng has name and read methods set\n2. Checks if the name already exists\n3. Adds rng to global rng_list\n4. May try to set rng to current_rng\n\nIf step 4 fails, it returns an error. However, it does not remove the\nrng from rng_list, causing a dangling reference which can result in\nuse-after-free if the caller frees rng, since registration failed.\n\nAdd a list_del_init() cleanup step."
    }
  ],
  "id": "CVE-2026-93163",
  "lastModified": "2026-09-17T17:18:11.763",
  "metrics": {},
  "published": "2026-09-17T17:18:11.763",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3a5834db2b1ce25649f330e78efe1ccde78967fd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bee8d1fcdc8f389b595b0a4cf6fe8440f499458a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cf293c9c7424de0d04b51367d07f40570ce80231"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/de4f1bcb61a73cc896decdbd27d61a34add93b53"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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