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

CVE-2025-68733 (GCVE-0-2025-68733)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:33 – Updated: 2026-05-11 21:52
VLAI
Title
smack: fix bug: unprivileged task can create labels
Summary
In the Linux kernel, the following vulnerability has been resolved: smack: fix bug: unprivileged task can create labels If an unprivileged task is allowed to relabel itself (/smack/relabel-self is not empty), it can freely create new labels by writing their names into own /proc/PID/attr/smack/current This occurs because do_setattr() imports the provided label in advance, before checking "relabel-self" list. This change ensures that the "relabel-self" list is checked before importing the label.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 38416e53936ecf896948fdeffc36b76979117952 , < c80173233014a360c13fa5cc79d36bfe6e53a8ed (git)
Affected: 38416e53936ecf896948fdeffc36b76979117952 , < 6b1e45e13546c9ea0b1d99097993ac0aafae90b1 (git)
Affected: 38416e53936ecf896948fdeffc36b76979117952 , < 4a7a7621619a366712fb9cefcb6e69f956c247ce (git)
Affected: 38416e53936ecf896948fdeffc36b76979117952 , < f8fd5491100f920847a3338d5fba22db19c72773 (git)
Affected: 38416e53936ecf896948fdeffc36b76979117952 , < ac9fce2efabad37c338aac86fbe100f77a080e59 (git)
Affected: 38416e53936ecf896948fdeffc36b76979117952 , < 64aa81250171b6bb6803e97ea7a5d73bfa061f6e (git)
Affected: 38416e53936ecf896948fdeffc36b76979117952 , < 60e8d49989410a7ade60f5dadfcd979c117d05c0 (git)
Affected: 38416e53936ecf896948fdeffc36b76979117952 , < c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.4
Unaffected: 0 , < 4.4 (semver)
Unaffected: 5.10.248 , ≤ 5.10.* (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.63 , ≤ 6.12.* (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (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": [
            "security/smack/smack_lsm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c80173233014a360c13fa5cc79d36bfe6e53a8ed",
              "status": "affected",
              "version": "38416e53936ecf896948fdeffc36b76979117952",
              "versionType": "git"
            },
            {
              "lessThan": "6b1e45e13546c9ea0b1d99097993ac0aafae90b1",
              "status": "affected",
              "version": "38416e53936ecf896948fdeffc36b76979117952",
              "versionType": "git"
            },
            {
              "lessThan": "4a7a7621619a366712fb9cefcb6e69f956c247ce",
              "status": "affected",
              "version": "38416e53936ecf896948fdeffc36b76979117952",
              "versionType": "git"
            },
            {
              "lessThan": "f8fd5491100f920847a3338d5fba22db19c72773",
              "status": "affected",
              "version": "38416e53936ecf896948fdeffc36b76979117952",
              "versionType": "git"
            },
            {
              "lessThan": "ac9fce2efabad37c338aac86fbe100f77a080e59",
              "status": "affected",
              "version": "38416e53936ecf896948fdeffc36b76979117952",
              "versionType": "git"
            },
            {
              "lessThan": "64aa81250171b6bb6803e97ea7a5d73bfa061f6e",
              "status": "affected",
              "version": "38416e53936ecf896948fdeffc36b76979117952",
              "versionType": "git"
            },
            {
              "lessThan": "60e8d49989410a7ade60f5dadfcd979c117d05c0",
              "status": "affected",
              "version": "38416e53936ecf896948fdeffc36b76979117952",
              "versionType": "git"
            },
            {
              "lessThan": "c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3",
              "status": "affected",
              "version": "38416e53936ecf896948fdeffc36b76979117952",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "security/smack/smack_lsm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.4"
            },
            {
              "lessThan": "4.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.248",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.63",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.248",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.198",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.160",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.120",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.63",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.13",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.2",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "4.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmack: fix bug: unprivileged task can create labels\n\nIf an unprivileged task is allowed to relabel itself\n(/smack/relabel-self is not empty),\nit can freely create new labels by writing their\nnames into own /proc/PID/attr/smack/current\n\nThis occurs because do_setattr() imports\nthe provided label in advance,\nbefore checking \"relabel-self\" list.\n\nThis change ensures that the \"relabel-self\" list\nis checked before importing the label."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:52:17.465Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c80173233014a360c13fa5cc79d36bfe6e53a8ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b1e45e13546c9ea0b1d99097993ac0aafae90b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a7a7621619a366712fb9cefcb6e69f956c247ce"
        },
        {
          "url": "https://git.kernel.org/stable/c/f8fd5491100f920847a3338d5fba22db19c72773"
        },
        {
          "url": "https://git.kernel.org/stable/c/ac9fce2efabad37c338aac86fbe100f77a080e59"
        },
        {
          "url": "https://git.kernel.org/stable/c/64aa81250171b6bb6803e97ea7a5d73bfa061f6e"
        },
        {
          "url": "https://git.kernel.org/stable/c/60e8d49989410a7ade60f5dadfcd979c117d05c0"
        },
        {
          "url": "https://git.kernel.org/stable/c/c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3"
        }
      ],
      "title": "smack: fix bug: unprivileged task can create labels",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68733",
    "datePublished": "2025-12-24T10:33:15.347Z",
    "dateReserved": "2025-12-24T10:30:51.028Z",
    "dateUpdated": "2026-05-11T21:52:17.465Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-68733",
      "date": "2026-09-18",
      "epss": "0.00193",
      "percentile": "0.09335"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T02:39:17.000Z",
      "cve": "CVE-2025-68733",
      "id": "msrc_CVE-2025-68733",
      "initial_release_date": "2025-12-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "3",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "smack: fix bug: unprivileged task can create labels",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-68733.json",
      "version": "5"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "security/smack/smack_lsm.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "c80173233014a360c13fa5cc79d36bfe6e53a8ed",
                    "status": "affected",
                    "version": "38416e53936ecf896948fdeffc36b76979117952",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6b1e45e13546c9ea0b1d99097993ac0aafae90b1",
                    "status": "affected",
                    "version": "38416e53936ecf896948fdeffc36b76979117952",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "4a7a7621619a366712fb9cefcb6e69f956c247ce",
                    "status": "affected",
                    "version": "38416e53936ecf896948fdeffc36b76979117952",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "f8fd5491100f920847a3338d5fba22db19c72773",
                    "status": "affected",
                    "version": "38416e53936ecf896948fdeffc36b76979117952",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "ac9fce2efabad37c338aac86fbe100f77a080e59",
                    "status": "affected",
                    "version": "38416e53936ecf896948fdeffc36b76979117952",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "64aa81250171b6bb6803e97ea7a5d73bfa061f6e",
                    "status": "affected",
                    "version": "38416e53936ecf896948fdeffc36b76979117952",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "60e8d49989410a7ade60f5dadfcd979c117d05c0",
                    "status": "affected",
                    "version": "38416e53936ecf896948fdeffc36b76979117952",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3",
                    "status": "affected",
                    "version": "38416e53936ecf896948fdeffc36b76979117952",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "security/smack/smack_lsm.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "4.4"
                  },
                  {
                    "lessThan": "4.4",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.248",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.198",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.160",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.120",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.63",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.17.*",
                    "status": "unaffected",
                    "version": "6.17.13",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.2",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.19",
                    "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\nsmack: fix bug: unprivileged task can create labels\n\nIf an unprivileged task is allowed to relabel itself\n(/smack/relabel-self is not empty),\nit can freely create new labels by writing their\nnames into own /proc/PID/attr/smack/current\n\nThis occurs because do_setattr() imports\nthe provided label in advance,\nbefore checking \"relabel-self\" list.\n\nThis change ensures that the \"relabel-self\" list\nis checked before importing the label."
          }
        ],
        "id": "CVE-2025-68733",
        "lastModified": "2026-06-17T09:59:29.853",
        "metrics": {},
        "published": "2025-12-24T11:16:02.600",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/4a7a7621619a366712fb9cefcb6e69f956c247ce"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/60e8d49989410a7ade60f5dadfcd979c117d05c0"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/64aa81250171b6bb6803e97ea7a5d73bfa061f6e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6b1e45e13546c9ea0b1d99097993ac0aafae90b1"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ac9fce2efabad37c338aac86fbe100f77a080e59"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/c147e13ea7fe9f118f8c9ba5e96cbd644b00d6b3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/c80173233014a360c13fa5cc79d36bfe6e53a8ed"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f8fd5491100f920847a3338d5fba22db19c72773"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:13:51+00:00",
      "cve": "CVE-2025-68733",
      "id": "CVE-2025-68733",
      "initial_release_date": "2025-12-24T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: smack: fix bug: unprivileged task can create labels",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68733.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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.