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

Vulnerability from cvelistv5 – Published: 2025-05-02 15:55 – Updated: 2026-05-23 15:27
VLAI
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted 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)
Create a notification for this product.
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)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "992a3f3e8a0c92151dfdf65fc85567c865fd558a",
              "status": "affected",
              "version": "e6f4fd85ef1ee6ab356bfbd64df28c1cb73aee7e",
              "versionType": "git"
            },
            {
              "lessThan": "d77531fac6a1fd9f1db0195438ba5419d72b96c4",
              "status": "affected",
              "version": "d7e7b9af104c7b389a0c21eb26532511bce4b510",
              "versionType": "git"
            },
            {
              "lessThan": "497ab5d9c7852dfedab2c9de75e41b60e54b7c5d",
              "status": "affected",
              "version": "d7e7b9af104c7b389a0c21eb26532511bce4b510",
              "versionType": "git"
            },
            {
              "lessThan": "ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a",
              "status": "affected",
              "version": "d7e7b9af104c7b389a0c21eb26532511bce4b510",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "391cceee6d435e616f68631e68f5b32d480b1e67",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "68d15d6558a386f46d815a6ac39edecad713a1bf",
              "versionType": "git"
            },
            {
              "lessThan": "5.15.105",
              "status": "affected",
              "version": "5.15.78",
              "versionType": "semver"
            },
            {
              "lessThan": "5.11",
              "status": "affected",
              "version": "5.10.154",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1",
              "status": "affected",
              "version": "6.0.8",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "lessThan": "6.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.22",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.105",
                  "versionStartIncluding": "5.15.78",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.22",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.9",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.10.154",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.0.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:27:51.023Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/992a3f3e8a0c92151dfdf65fc85567c865fd558a"
        },
        {
          "url": "https://git.kernel.org/stable/c/d77531fac6a1fd9f1db0195438ba5419d72b96c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/497ab5d9c7852dfedab2c9de75e41b60e54b7c5d"
        },
        {
          "url": "https://git.kernel.org/stable/c/ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a"
        }
      ],
      "title": "fscrypt: destroy keyring after security_sb_delete()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53055",
    "datePublished": "2025-05-02T15:55:10.138Z",
    "dateReserved": "2025-05-02T15:51:43.547Z",
    "dateUpdated": "2026-05-23T15:27:51.023Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-53055",
      "date": "2026-07-17",
      "epss": "0.00165",
      "percentile": "0.06113"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53055\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-02T16:15:24.590\",\"lastModified\":\"2026-06-17T06:44:12.603\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fscrypt: destruir el anillo de claves despu\u00e9s de security_sb_delete(). fscrypt_destroy_keyring() debe llamarse despu\u00e9s de expulsar todos los inodos potencialmente cifrados; de lo contrario, no puede destruir el anillo de claves de forma segura. Dado que los inodos en uso por el LSM de Landlock no se expulsan hasta security_sb_delete(), esto significa que fscrypt_destroy_keyring() debe llamarse *despu\u00e9s* de security_sb_delete(). Esto corrige un WARN_ON seguido de una desreferencia a NULL, solo posible si Landlock se utilizaba en archivos cifrados.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/super.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e6f4fd85ef1ee6ab356bfbd64df28c1cb73aee7e\",\"lessThan\":\"992a3f3e8a0c92151dfdf65fc85567c865fd558a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d7e7b9af104c7b389a0c21eb26532511bce4b510\",\"lessThan\":\"d77531fac6a1fd9f1db0195438ba5419d72b96c4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d7e7b9af104c7b389a0c21eb26532511bce4b510\",\"lessThan\":\"497ab5d9c7852dfedab2c9de75e41b60e54b7c5d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d7e7b9af104c7b389a0c21eb26532511bce4b510\",\"lessThan\":\"ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"391cceee6d435e616f68631e68f5b32d480b1e67\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"68d15d6558a386f46d815a6ac39edecad713a1bf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.15.78\",\"lessThan\":\"5.15.105\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.10.154\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.0.8\",\"lessThan\":\"6.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/super.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.105\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.22\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2.9\",\"lessThanOrEqual\":\"6.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.154\",\"versionEndExcluding\":\"5.11\",\"matchCriteriaId\":\"38E90823-50E2-40DF-BB78-E1A2B39ED662\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.78\",\"versionEndExcluding\":\"5.15.105\",\"matchCriteriaId\":\"4D63521B-0F26-49B1-B862-EF7E310E9381\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.0.8\",\"versionEndExcluding\":\"6.1.22\",\"matchCriteriaId\":\"E4176824-BD3D-4005-B64B-29AE319C85B6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.2.9\",\"matchCriteriaId\":\"914F22DD-1E6F-4B0A-A14D-3A9F068F6761\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8E3B0E8-FA27-4305-87BB-AF6C25B160CB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"A47F0FC3-CE52-4BA1-BA51-22F783938431\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3583026A-27EC-4A4C-850A-83F2AF970673\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/497ab5d9c7852dfedab2c9de75e41b60e54b7c5d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/992a3f3e8a0c92151dfdf65fc85567c865fd558a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d77531fac6a1fd9f1db0195438ba5419d72b96c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:33:40+00:00",
      "cve": "CVE-2023-53055",
      "id": "CVE-2023-53055",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "150",
      "product_status:known_not_affected": "124",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fscrypt: destroy keyring after security_sb_delete()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53055.json",
      "version": "3"
    }
  }
}



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.