Vulnerability-Lookup

GHSA-22CG-3QR6-XX65

Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32

Details

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

hwrng: core - fix rng list on registration error

hwrng_register(rng) does the following:

Checks if rng has name and read methods set
Checks if the name already exists
Adds rng to global rng_list
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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-93163"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:18:11Z",
    "severity": null
  },
  "details": "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": "GHSA-22cg-3qr6-xx65",
  "modified": "2026-09-17T18:32:12Z",
  "published": "2026-09-17T18:32:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93163"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a5834db2b1ce25649f330e78efe1ccde78967fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bee8d1fcdc8f389b595b0a4cf6fe8440f499458a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf293c9c7424de0d04b51367d07f40570ce80231"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de4f1bcb61a73cc896decdbd27d61a34add93b53"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-93163 (GCVE-0-2026-93163)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:11 – Updated: 2026-09-17 16:11

Title

hwrng: core - fix rng list on registration error

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.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/de4f1bcb61a73cc89…
https://git.kernel.org/stable/c/cf293c9c7424de0d0…
https://git.kernel.org/stable/c/bee8d1fcdc8f389b5…
https://git.kernel.org/stable/c/3a5834db2b1ce2564…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2bbb6983887fefc8026beab01198d30f47b7bd22 , < de4f1bcb61a73cc896decdbd27d61a34add93b53 (git) Affected: 2bbb6983887fefc8026beab01198d30f47b7bd22 , < cf293c9c7424de0d04b51367d07f40570ce80231 (git) Affected: 2bbb6983887fefc8026beab01198d30f47b7bd22 , < bee8d1fcdc8f389b595b0a4cf6fe8440f499458a (git) Affected: 2bbb6983887fefc8026beab01198d30f47b7bd22 , < 3a5834db2b1ce25649f330e78efe1ccde78967fd (git) Affected: 42802952a2725f85f7e36ee3b29593af5fe87197 (git) Affected: 4.9.320 , < 4.10 (semver)
Linux	Linux	Affected: 4.14 Unaffected: 0 , < 4.14 (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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