CVE-2026-98322 (GCVE-0-2026-98322)
Vulnerability from cvelistv5
Published
2026-10-06 08:46
Modified
2026-10-19 09:17
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_nat: fully initialise new_addr in netmap setup nft_nat_setup_netmap() builds the mapped address in an on-stack union nf_inet_addr. For an IPv4 mapping it writes only the 4-byte .ip member and the loop runs a single 32-bit iteration, but it then copies the whole 16-byte union into range->min_addr and range->max_addr, so the upper 12 bytes reach nf_nat_setup_info() uninitialised. KMSAN reports an uninit-value in nf_nat_setup_info() reached from nft_nat_eval(). The IPv6 path fills all 16 bytes and is not affected. Zero-initialise new_addr.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3ff7ddb1353da9b535e65702704cbadea1da9a00
Version: 3ff7ddb1353da9b535e65702704cbadea1da9a00
Version: 3ff7ddb1353da9b535e65702704cbadea1da9a00
Version: 3ff7ddb1353da9b535e65702704cbadea1da9a00
Version: 3ff7ddb1353da9b535e65702704cbadea1da9a00
Version: 3ff7ddb1353da9b535e65702704cbadea1da9a00
Version: 3ff7ddb1353da9b535e65702704cbadea1da9a00
Version: 3ff7ddb1353da9b535e65702704cbadea1da9a00
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nft_nat.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "5.8"
            },
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              "version": "0",
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            },
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              "status": "unaffected",
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              "status": "unaffected",
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              "status": "unaffected",
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            },
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              "version": "7.3",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              ],
              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_nat: fully initialise new_addr in netmap setup\n\nnft_nat_setup_netmap() builds the mapped address in an on-stack\nunion nf_inet_addr. For an IPv4 mapping it writes only the 4-byte .ip\nmember and the loop runs a single 32-bit iteration, but it then copies\nthe whole 16-byte union into range-\u003emin_addr and range-\u003emax_addr, so the\nupper 12 bytes reach nf_nat_setup_info() uninitialised.\n\nKMSAN reports an uninit-value in nf_nat_setup_info() reached from\nnft_nat_eval(). The IPv6 path fills all 16 bytes and is not affected.\n\nZero-initialise new_addr."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:17:32.745Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/29365695842db0a97b701a43a09fad1b4f7ecf3e"
        },
        {
          "url": "https://git.kernel.org/stable/c/7b9380c38c2fd2189416fa602bdbc5c8523b84b2"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb2030137dba3b59cbb5057a33af70488d6bc231"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4982c489ee359162eee3ece1fb36082648464a5"
        },
        {
          "url": "https://git.kernel.org/stable/c/161f5860c92a8ec80b6bdff16e79d70dcd8afc5a"
        },
        {
          "url": "https://git.kernel.org/stable/c/0ce42c7b84032335abff9eac43762e4ca8224451"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c43f5db482f74b41987c39c9c375a5e767556eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/d313499df66159b4b7971d760d16729598ab7e5a"
        }
      ],
      "title": "netfilter: nft_nat: fully initialise new_addr in netmap setup",
      "x_generator": {
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98322",
    "datePublished": "2026-10-06T08:46:16.346Z",
    "dateReserved": "2026-09-25T10:25:14.340Z",
    "dateUpdated": "2026-10-19T09:17:32.745Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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