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netfilter: nft_nat: fully initialise new_addr in netmap setup

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-98322

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98322

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
        "lessThan": "29365695842db0a97b701a43a09fad1b4f7ecf3e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
        "lessThan": "7b9380c38c2fd2189416fa602bdbc5c8523b84b2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
        "lessThan": "eb2030137dba3b59cbb5057a33af70488d6bc231",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
        "lessThan": "e4982c489ee359162eee3ece1fb36082648464a5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
        "lessThan": "161f5860c92a8ec80b6bdff16e79d70dcd8afc5a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
        "lessThan": "0ce42c7b84032335abff9eac43762e4ca8224451",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
        "lessThan": "1c43f5db482f74b41987c39c9c375a5e767556eb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3ff7ddb1353da9b535e65702704cbadea1da9a00",
        "lessThan": "d313499df66159b4b7971d760d16729598ab7e5a",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/netfilter/nft_nat.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.8"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.8",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.54",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/netfilter/nft_nat.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98322

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38401 · Revision 1
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Publisher date
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