CVE-2023-53391 (GCVE-0-2023-53391)

Vulnerability from cvelistv5 – Published: 2025-09-18 13:33 – Updated: 2026-05-11 19:44
VLAI
Title
shmem: use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs
Summary
In the Linux kernel, the following vulnerability has been resolved: shmem: use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs As the ramfs-based tmpfs uses ramfs_init_fs_context() for the init_fs_context method, which allocates fc->s_fs_info, use ramfs_kill_sb() to free it and avoid a memory leak.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:59 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c3b1b1cbf002e65a3cabd479e68b5f35886a26db , < 5fada375113767b3b57f1b04f7a4fe64ffaa626f (git)
Affected: c3b1b1cbf002e65a3cabd479e68b5f35886a26db , < 487f229efea80c00dd7397547ec4f25fb8999d99 (git)
Affected: c3b1b1cbf002e65a3cabd479e68b5f35886a26db , < 1f34bf8b442c6d720e7fa6f15e8702427e48aea9 (git)
Affected: c3b1b1cbf002e65a3cabd479e68b5f35886a26db , < ebe07db840992a3886694ac3d303b06f4b70ce00 (git)
Affected: c3b1b1cbf002e65a3cabd479e68b5f35886a26db , < 36ce9d76b0a93bae799e27e4f5ac35478c676592 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.30
Unaffected: 0 , < 2.6.30 (semver)
Unaffected: 5.10.188 , ≤ 5.10.* (semver)
Unaffected: 5.15.121 , ≤ 5.15.* (semver)
Unaffected: 6.1.39 , ≤ 6.1.* (semver)
Unaffected: 6.4.4 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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                  "version": "c3b1b1cbf002e65a3cabd479e68b5f35886a26db",
                  "versionType": "git"
                },
                {
                  "lessThan": "487f229efea80c00dd7397547ec4f25fb8999d99",
                  "status": "affected",
                  "version": "c3b1b1cbf002e65a3cabd479e68b5f35886a26db",
                  "versionType": "git"
                },
                {
                  "lessThan": "1f34bf8b442c6d720e7fa6f15e8702427e48aea9",
                  "status": "affected",
                  "version": "c3b1b1cbf002e65a3cabd479e68b5f35886a26db",
                  "versionType": "git"
                },
                {
                  "lessThan": "ebe07db840992a3886694ac3d303b06f4b70ce00",
                  "status": "affected",
                  "version": "c3b1b1cbf002e65a3cabd479e68b5f35886a26db",
                  "versionType": "git"
                },
                {
                  "lessThan": "36ce9d76b0a93bae799e27e4f5ac35478c676592",
                  "status": "affected",
                  "version": "c3b1b1cbf002e65a3cabd479e68b5f35886a26db",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "fs/ramfs/inode.c",
                "include/linux/ramfs.h",
                "mm/shmem.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "2.6.30"
                },
                {
                  "lessThan": "2.6.30",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.188",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.121",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.39",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.4.*",
                  "status": "unaffected",
                  "version": "6.4.4",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.5",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.188",
                      "versionStartIncluding": "2.6.30",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.121",
                      "versionStartIncluding": "2.6.30",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.39",
                      "versionStartIncluding": "2.6.30",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.4.4",
                      "versionStartIncluding": "2.6.30",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.5",
                      "versionStartIncluding": "2.6.30",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nshmem: use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs\n\nAs the ramfs-based tmpfs uses ramfs_init_fs_context() for the\ninit_fs_context method, which allocates fc-\u003es_fs_info, use ramfs_kill_sb()\nto free it and avoid a memory leak."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T19:44:03.015Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/5fada375113767b3b57f1b04f7a4fe64ffaa626f"
            },
            {
              "url": "https://git.kernel.org/stable/c/487f229efea80c00dd7397547ec4f25fb8999d99"
            },
            {
              "url": "https://git.kernel.org/stable/c/1f34bf8b442c6d720e7fa6f15e8702427e48aea9"
            },
            {
              "url": "https://git.kernel.org/stable/c/ebe07db840992a3886694ac3d303b06f4b70ce00"
            },
            {
              "url": "https://git.kernel.org/stable/c/36ce9d76b0a93bae799e27e4f5ac35478c676592"
            }
          ],
          "title": "shmem: use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-53391",
        "datePublished": "2025-09-18T13:33:33.602Z",
        "dateReserved": "2025-09-17T14:54:09.737Z",
        "dateUpdated": "2026-05-11T19:44:03.015Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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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.



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.