{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-45891",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-45891",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-27T12:17:02.306Z",
    "updatedAt": "2026-05-27T12:17:02.306Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "net: hns3: fix double free issue for tx spare buffer",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hns3: fix double free issue for tx spare buffer\n\nIn hns3_set_ringparam(), a temporary copy (tmp_rings) of the ring structure\nis created for rollback. However, the tx_spare pointer in the original\nring handle is incorrectly left pointing to the old backup memory.\n\nLater, if memory allocation fails in hns3_init_all_ring() during the setup,\nthe error path attempts to free all newly allocated rings. Since tx_spare\ncontains a stale (non-NULL) pointer from the backup, it is mistaken for\na newly allocated buffer and is erroneously freed, leading to a double-free\nof the backup memory.\n\nThe root cause is that the tx_spare field was not cleared after its value\nwas saved in tmp_rings, leaving a dangling pointer.\n\nFix this by setting tx_spare to NULL in the original ring structure\nwhen the creation of the new `tx_spare` fails. This ensures the\nerror cleanup path only frees genuinely newly allocated buffers.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "907676b130711fd1f627824559e92259db2061d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fb6a4c376d454b425555b1b0bda36e99f56ec307"
            },
            {
              "version": "907676b130711fd1f627824559e92259db2061d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "43015461662d41dcfb3bb95fadd8a2a42ad8eacf"
            },
            {
              "version": "907676b130711fd1f627824559e92259db2061d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6dc10494cfe27b6f1e9adb7e293293ae39c50b7c"
            },
            {
              "version": "907676b130711fd1f627824559e92259db2061d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d2c785733dfb853ea0b53984c75662a1af230a94"
            },
            {
              "version": "907676b130711fd1f627824559e92259db2061d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fdbccddb7e7822016601829f95de4008e193f7bc"
            },
            {
              "version": "907676b130711fd1f627824559e92259db2061d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c3659273860bed0c8e573b865e3769abc51225a8"
            },
            {
              "version": "907676b130711fd1f627824559e92259db2061d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6d2f142b1e4b203387a92519d9d2e34752a79dbb"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.14"
            },
            {
              "version": "5.15.202",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.165",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.128",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.75",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.14",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}