Vulnerability-Lookup

GHSA-77X5-PWH8-3QQ8

Vulnerability from github – Published: 2025-05-02 18:31 – Updated: 2025-11-12 18:31

Details

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

fscrypt: destroy keyring after security_sb_delete()

fscrypt_destroy_keyring() must be called after all potentially-encrypted inodes were evicted; otherwise it cannot safely destroy the keyring. Since inodes that are in-use by the Landlock LSM don't get evicted until security_sb_delete(), this means that fscrypt_destroy_keyring() must be called after security_sb_delete().

This fixes a WARN_ON followed by a NULL dereference, only possible if Landlock was being used on encrypted files.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53055"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-02T16:15:24Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfscrypt: destroy keyring after security_sb_delete()\n\nfscrypt_destroy_keyring() must be called after all potentially-encrypted\ninodes were evicted; otherwise it cannot safely destroy the keyring.\nSince inodes that are in-use by the Landlock LSM don\u0027t get evicted until\nsecurity_sb_delete(), this means that fscrypt_destroy_keyring() must be\ncalled *after* security_sb_delete().\n\nThis fixes a WARN_ON followed by a NULL dereference, only possible if\nLandlock was being used on encrypted files.",
  "id": "GHSA-77x5-pwh8-3qq8",
  "modified": "2025-11-12T18:31:04Z",
  "published": "2025-05-02T18:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53055"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/497ab5d9c7852dfedab2c9de75e41b60e54b7c5d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/992a3f3e8a0c92151dfdf65fc85567c865fd558a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d77531fac6a1fd9f1db0195438ba5419d72b96c4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-53055 (GCVE-0-2023-53055)

Vulnerability from cvelistv5 – Published: 2025-05-02 15:55 – Updated: 2026-05-23 15:27

Title

fscrypt: destroy keyring after security_sb_delete()

Summary

In the Linux kernel, the following vulnerability has been resolved: fscrypt: destroy keyring after security_sb_delete() fscrypt_destroy_keyring() must be called after all potentially-encrypted inodes were evicted; otherwise it cannot safely destroy the keyring. Since inodes that are in-use by the Landlock LSM don't get evicted until security_sb_delete(), this means that fscrypt_destroy_keyring() must be called *after* security_sb_delete(). This fixes a WARN_ON followed by a NULL dereference, only possible if Landlock was being used on encrypted files.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/992a3f3e8a0c92151…
https://git.kernel.org/stable/c/d77531fac6a1fd9f1…
https://git.kernel.org/stable/c/497ab5d9c7852dfed…
https://git.kernel.org/stable/c/ccb820dc7d2236b1a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e6f4fd85ef1ee6ab356bfbd64df28c1cb73aee7e , < 992a3f3e8a0c92151dfdf65fc85567c865fd558a (git) Affected: d7e7b9af104c7b389a0c21eb26532511bce4b510 , < d77531fac6a1fd9f1db0195438ba5419d72b96c4 (git) Affected: d7e7b9af104c7b389a0c21eb26532511bce4b510 , < 497ab5d9c7852dfedab2c9de75e41b60e54b7c5d (git) Affected: d7e7b9af104c7b389a0c21eb26532511bce4b510 , < ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a (git) Affected: 391cceee6d435e616f68631e68f5b32d480b1e67 (git) Affected: 68d15d6558a386f46d815a6ac39edecad713a1bf (git) Affected: 5.15.78 , < 5.15.105 (semver) Affected: 5.10.154 , < 5.11 (semver) Affected: 6.0.8 , < 6.1 (semver)
Linux	Linux	Affected: 6.1 Unaffected: 0 , < 6.1 (semver) Unaffected: 5.15.105 , ≤ 5.15.* (semver) Unaffected: 6.1.22 , ≤ 6.1.* (semver) Unaffected: 6.2.9 , ≤ 6.2.* (semver) Unaffected: 6.3 , ≤ * (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.
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