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Security advisory

Type: advisorySources: OSVCVE: CVE-2023-49298

OpenZFS through 2.1.13 and 2.2.x through 2.2.1, in certain scenarios involving applications that try to rely on efficient copying of file data, can replace file contents with zero-valued bytes and thus potentially disable security mechanisms. NOTE: this issue is not always security related, but can be security related in realistic situations. A possible example is cp, from a recent GNU Core Utilities (coreutils) version, when attempting to preserve a rule set for denying unauthorized access. (One might use cp when configuring access control, such as with the /etc/hosts.deny file specified in the IBM Support reference.) NOTE: this issue occurs less often in version 2.2.1, and in versions before 2.1.4, because of the default configuration in those versions.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2023-49298
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 21:04 UTC · Revision 1

Source evidence

CVE-2023-49298

core-osv · Original source

Published 24 Nov 2023, 00:00 UTC

OpenZFS through 2.1.13 and 2.2.x through 2.2.1, in certain scenarios involving applications that try to rely on efficient copying of file data, can replace file contents with zero-valued bytes and thus potentially disable security mechanisms. NOTE: this issue is not always security related, but can be security related in realistic situations. A possible example is cp, from a recent GNU Core Utilities (coreutils) version, when attempting to preserve a rule set for denying unauthorized access. (One might use cp when configuring access control, such as with the /etc/hosts.deny file specified in the IBM Support reference.) NOTE: this issue occurs less often in version 2.2.1, and in versions before 2.1.4, because of the default configuration in those versions.

osv:CVE-2023-49298
Complete source record
{
  "id": "074454962a3a2866b9317916d99f63431248e06ba165abc1bca87e71b47ae67e",
  "url": "https://osv.dev/vulnerability/CVE-2023-49298",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2023-49298",
    "summary": "OpenZFS through 2.1.13 and 2.2.x through 2.2.1, in certain scenarios involving applications that try to rely on efficient copying of file data, can replace file contents with zero-valued bytes and thus potentially disable security mechanisms. NOTE: this issue is not always security related, but can be security related in realistic situations. A possible example is cp, from a recent GNU Core Utilities (coreutils) version, when attempting to preserve a rule set for denying unauthorized access. (One might use cp when configuring access control, such as with the /etc/hosts.deny file specified in the IBM Support reference.) NOTE: this issue occurs less often in version 2.2.1, and in versions before 2.1.4, because of the default configuration in those versions.",
    "evidence": "osv:CVE-2023-49298",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-49298",
      "aliases": [
        "CVE-2023-49298"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openzfs/zfs",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "eb62221ff0f9efbc2ab826ec6f1388c5f05fb664"
                },
                {
                  "introduced": "95785196f26e92d82cf4445654ba84e4a9671c57"
                },
                {
                  "fixed": "d99134be83753266b5f7a79738aeab5b08db1e35"
                },
                {
                  "fixed": "494aaaed89cb9fe9f2da3b6c6f465a4bc9f6a7e1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openzfs:openzfs:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.1.13"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openzfs:openzfs:2.2.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.2.0-NA"
                      },
                      {
                        "last_affected": "2.2.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d99134be83753266b5f7a79738aeab5b08db1e35"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "zfs-2.1.14"
                  },
                  {
                    "range": [
                      {
                        "fixed": "494aaaed89cb9fe9f2da3b6c6f465a4bc9f6a7e1"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "zfs-2.2.2"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.2.0-NA",
            "zfs-2.1.13",
            "zfs-2.2.1",
            "zfs-2.2.0",
            "zfs-2.1.12",
            "zfs-2.1.11",
            "zfs-2.1.10",
            "zfs-2.1.9",
            "zfs-2.1.8",
            "zfs-2.1.7",
            "zfs-2.1.6",
            "zfs-2.1.5",
            "zfs-2.1.4",
            "zfs-2.1.3",
            "zfs-2.1.2",
            "zfs-2.1.1",
            "zfs-2.1.0",
            "zfs-2.1.0-rc8",
            "zfs-2.1.0-rc7",
            "zfs-2.1.0-rc6",
            "zfs-2.1.0-rc5",
            "zfs-2.1.0-rc4",
            "zfs-2.1.0-rc3",
            "zfs-2.1.0-rc2",
            "zfs-2.1.0-rc1",
            "zfs-2.0.0-rc1",
            "zfs-0.8.0",
            "zfs-0.8.0-rc5",
            "zfs-0.8.0-rc4",
            "zfs-0.8.0-rc3",
            "zfs-0.8.0-rc2",
            "zfs-0.8.0-rc1",
            "zfs-0.7.0",
            "zfs-0.7.0-rc5",
            "zfs-0.7.0-rc4",
            "zfs-0.7.0-rc3",
            "zfs-0.7.0-rc2",
            "zfs-0.7.0-rc1",
            "zfs-0.6.5",
            "zfs-0.6.4",
            "zfs-0.6.3",
            "zfs-0.6.2",
            "zfs-0.6.1",
            "zfs-0.6.0-rc14",
            "zfs-0.6.0-rc13",
            "zfs-0.6.0-rc12",
            "zfs-0.6.0-rc11",
            "zfs-0.6.0-rc10",
            "zfs-0.6.0-rc9",
            "zfs-0.6.0-rc8",
            "zfs-0.6.0-rc7",
            "zfs-0.6.0-rc6",
            "zfs-0.6.0-rc5",
            "zfs-0.6.0-rc4",
            "zfs-0.6.0-rc3",
            "zfs-0.6.0-rc2",
            "zfs-0.6.0-rc1",
            "zfs-0.5.2",
            "zfs-0.5.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-49298.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.639278345Z",
      "provider": "osv",
      "references": [
        "https://bugs.gentoo.org/917224",
        "https://github.com/openzfs/zfs/releases/tag/zfs-2.1.14",
        "https://github.com/openzfs/zfs/releases/tag/zfs-2.2.2",
        "https://lists.debian.org/debian-lts-announce/2025/04/msg00009.html",
        "https://news.ycombinator.com/item?id=38405731",
        "https://news.ycombinator.com/item?id=38770168",
        "https://web.archive.org/web/20231124172959/https://www.ibm.com/support/pages/how-remove-missing%C2%A0newline%C2%A0or%C2%A0line%C2%A0too%C2%A0long-error-etchostsallow%C2%A0and%C2%A0etchostsdeny-files",
        "https://www.theregister.com/2023/12/04/two_new_versions_of_openzfs/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49298.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-49298",
        "https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275308",
        "https://github.com/openzfs/zfs/issues/15526",
        "https://github.com/openzfs/zfs/pull/15571",
        "https://lists.debian.org/debian-lts-announce/2024/03/msg00019.html"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49298.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-49298",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 507011,
  "published_at": "2023-11-24T00:00:00+00:00"
}