FKIE_CVE-2026-98322

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-06 09:18
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0ce42c7b84032335abff9eac43762e4ca8224451
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/161f5860c92a8ec80b6bdff16e79d70dcd8afc5a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c43f5db482f74b41987c39c9c375a5e767556eb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29365695842db0a97b701a43a09fad1b4f7ecf3e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b9380c38c2fd2189416fa602bdbc5c8523b84b2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d313499df66159b4b7971d760d16729598ab7e5a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4982c489ee359162eee3ece1fb36082648464a5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eb2030137dba3b59cbb5057a33af70488d6bc231
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nft_nat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "29365695842db0a97b701a43a09fad1b4f7ecf3e",
              "status": "affected",
              "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
              "versionType": "git"
            },
            {
              "lessThan": "7b9380c38c2fd2189416fa602bdbc5c8523b84b2",
              "status": "affected",
              "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
              "versionType": "git"
            },
            {
              "lessThan": "eb2030137dba3b59cbb5057a33af70488d6bc231",
              "status": "affected",
              "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
              "versionType": "git"
            },
            {
              "lessThan": "e4982c489ee359162eee3ece1fb36082648464a5",
              "status": "affected",
              "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
              "versionType": "git"
            },
            {
              "lessThan": "161f5860c92a8ec80b6bdff16e79d70dcd8afc5a",
              "status": "affected",
              "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
              "versionType": "git"
            },
            {
              "lessThan": "0ce42c7b84032335abff9eac43762e4ca8224451",
              "status": "affected",
              "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
              "versionType": "git"
            },
            {
              "lessThan": "1c43f5db482f74b41987c39c9c375a5e767556eb",
              "status": "affected",
              "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
              "versionType": "git"
            },
            {
              "lessThan": "d313499df66159b4b7971d760d16729598ab7e5a",
              "status": "affected",
              "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nft_nat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.8"
            },
            {
              "lessThan": "5.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-98322",
  "lastModified": "2026-10-06T09:18:24.243",
  "metrics": {},
  "published": "2026-10-06T09:18:24.243",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0ce42c7b84032335abff9eac43762e4ca8224451"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/161f5860c92a8ec80b6bdff16e79d70dcd8afc5a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1c43f5db482f74b41987c39c9c375a5e767556eb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29365695842db0a97b701a43a09fad1b4f7ecf3e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7b9380c38c2fd2189416fa602bdbc5c8523b84b2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d313499df66159b4b7971d760d16729598ab7e5a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e4982c489ee359162eee3ece1fb36082648464a5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eb2030137dba3b59cbb5057a33af70488d6bc231"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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