CVE-2023-53619 (GCVE-0-2023-53619)
Vulnerability from cvelistv5
Published
2025-10-07 15:19
Modified
2025-10-07 15:19
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: Avoid nf_ct_helper_hash uses after free If nf_conntrack_init_start() fails (for example due to a register_nf_conntrack_bpf() failure), the nf_conntrack_helper_fini() clean-up path frees the nf_ct_helper_hash map. When built with NF_CONNTRACK=y, further netfilter modules (e.g: netfilter_conntrack_ftp) can still be loaded and call nf_conntrack_helpers_register(), independently of whether nf_conntrack initialized correctly. This accesses the nf_ct_helper_hash dangling pointer and causes a uaf, possibly leading to random memory corruption. This patch guards nf_conntrack_helper_register() from accessing a freed or uninitialized nf_ct_helper_hash pointer and fixes possible uses-after-free when loading a conntrack module.
References
Impacted products
Vendor Product Version
Linux Linux Version: 12f7a505331e6b2754684b509f2ac8f0011ce644
Version: 12f7a505331e6b2754684b509f2ac8f0011ce644
Version: 12f7a505331e6b2754684b509f2ac8f0011ce644
Version: 12f7a505331e6b2754684b509f2ac8f0011ce644
Version: 12f7a505331e6b2754684b509f2ac8f0011ce644
Version: 12f7a505331e6b2754684b509f2ac8f0011ce644
Version: 12f7a505331e6b2754684b509f2ac8f0011ce644
Version: 12f7a505331e6b2754684b509f2ac8f0011ce644
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conntrack_helper.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4ee69c91cb8f9ca144bc0861969e5a1a3c6152a7",
              "status": "affected",
              "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
              "versionType": "git"
            },
            {
              "lessThan": "00716f25f9697d02a0d9bd622575c7c7321ba3d0",
              "status": "affected",
              "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
              "versionType": "git"
            },
            {
              "lessThan": "61c7a5256543ae7d24cd9d21853d514c8632e1e9",
              "status": "affected",
              "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
              "versionType": "git"
            },
            {
              "lessThan": "8289d422f5e484efe4a565fe18e862ecd621c175",
              "status": "affected",
              "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
              "versionType": "git"
            },
            {
              "lessThan": "6f03ce2f1abcb9f9d0511e3659ca6eb60e39f566",
              "status": "affected",
              "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
              "versionType": "git"
            },
            {
              "lessThan": "05561f822f27b9fa88fa5504ddec34bf38833034",
              "status": "affected",
              "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
              "versionType": "git"
            },
            {
              "lessThan": "fce5cc7cbd4b92f979bf02c9ec5fb69aaeba92d7",
              "status": "affected",
              "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
              "versionType": "git"
            },
            {
              "lessThan": "6eef7a2b933885a17679eb8ed0796ddf0ee5309b",
              "status": "affected",
              "version": "12f7a505331e6b2754684b509f2ac8f0011ce644",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conntrack_helper.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.6"
            },
            {
              "lessThan": "3.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.322",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.291",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.251",
              "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": "4.14.322",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.291",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.251",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.188",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.121",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.39",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.4",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: Avoid nf_ct_helper_hash uses after free\n\nIf nf_conntrack_init_start() fails (for example due to a\nregister_nf_conntrack_bpf() failure), the nf_conntrack_helper_fini()\nclean-up path frees the nf_ct_helper_hash map.\n\nWhen built with NF_CONNTRACK=y, further netfilter modules (e.g:\nnetfilter_conntrack_ftp) can still be loaded and call\nnf_conntrack_helpers_register(), independently of whether nf_conntrack\ninitialized correctly. This accesses the nf_ct_helper_hash dangling\npointer and causes a uaf, possibly leading to random memory corruption.\n\nThis patch guards nf_conntrack_helper_register() from accessing a freed\nor uninitialized nf_ct_helper_hash pointer and fixes possible\nuses-after-free when loading a conntrack module."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-07T15:19:26.003Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4ee69c91cb8f9ca144bc0861969e5a1a3c6152a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/00716f25f9697d02a0d9bd622575c7c7321ba3d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/61c7a5256543ae7d24cd9d21853d514c8632e1e9"
        },
        {
          "url": "https://git.kernel.org/stable/c/8289d422f5e484efe4a565fe18e862ecd621c175"
        },
        {
          "url": "https://git.kernel.org/stable/c/6f03ce2f1abcb9f9d0511e3659ca6eb60e39f566"
        },
        {
          "url": "https://git.kernel.org/stable/c/05561f822f27b9fa88fa5504ddec34bf38833034"
        },
        {
          "url": "https://git.kernel.org/stable/c/fce5cc7cbd4b92f979bf02c9ec5fb69aaeba92d7"
        },
        {
          "url": "https://git.kernel.org/stable/c/6eef7a2b933885a17679eb8ed0796ddf0ee5309b"
        }
      ],
      "title": "netfilter: conntrack: Avoid nf_ct_helper_hash uses after free",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53619",
    "datePublished": "2025-10-07T15:19:26.003Z",
    "dateReserved": "2025-10-07T15:16:59.655Z",
    "dateUpdated": "2025-10-07T15:19:26.003Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53619\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-07T16:15:44.473\",\"lastModified\":\"2025-10-08T19:38:32.610\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: conntrack: Avoid nf_ct_helper_hash uses after free\\n\\nIf nf_conntrack_init_start() fails (for example due to a\\nregister_nf_conntrack_bpf() failure), the nf_conntrack_helper_fini()\\nclean-up path frees the nf_ct_helper_hash map.\\n\\nWhen built with NF_CONNTRACK=y, further netfilter modules (e.g:\\nnetfilter_conntrack_ftp) can still be loaded and call\\nnf_conntrack_helpers_register(), independently of whether nf_conntrack\\ninitialized correctly. This accesses the nf_ct_helper_hash dangling\\npointer and causes a uaf, possibly leading to random memory corruption.\\n\\nThis patch guards nf_conntrack_helper_register() from accessing a freed\\nor uninitialized nf_ct_helper_hash pointer and fixes possible\\nuses-after-free when loading a conntrack module.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/00716f25f9697d02a0d9bd622575c7c7321ba3d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/05561f822f27b9fa88fa5504ddec34bf38833034\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4ee69c91cb8f9ca144bc0861969e5a1a3c6152a7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/61c7a5256543ae7d24cd9d21853d514c8632e1e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6eef7a2b933885a17679eb8ed0796ddf0ee5309b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6f03ce2f1abcb9f9d0511e3659ca6eb60e39f566\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8289d422f5e484efe4a565fe18e862ecd621c175\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fce5cc7cbd4b92f979bf02c9ec5fb69aaeba92d7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.