FKIE_CVE-2026-98793

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-30 13:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: bpf: reject invalid NAT manipulation types As bpf_ct_set_nat_info() is not validating the NAT manipulation type a wrong value can be passed directly to nf_nat_setup_info(). This triggers the WARN_ON() at nf_nat_setup_info() and if panic_on_warn isn't set, then IPS_SRC_NAT_DONE is set without adding nat_bysource and conntrack cleanup tries to unlink an uninitialized hlist node. Fix this by checking that NAT manipulation type is correct before calling nf_nat_setup_info(). In addition, if the WARN_ON is hit, return NF_DROP instead of continuing with the processing to avoid similar situations in the future.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/16d464013ec2267b00a83f4bfbb97b3ecc63bfa7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/58108f05b0502448f6bb612ee2eccc63bd6449cb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/752492947be3123ea6c689e2f93ae04ecd675d42
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ce7b41f0e4b5db0580d0a2059a0c9e672b461b5e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ea777dc90ab37e64fa4b92f6fcf3b5edcef5e058
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f6143ae109df56d51d5536e813deb19eee7a6205
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_nat_bpf.c",
            "net/netfilter/nf_nat_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ce7b41f0e4b5db0580d0a2059a0c9e672b461b5e",
              "status": "affected",
              "version": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
              "versionType": "git"
            },
            {
              "lessThan": "752492947be3123ea6c689e2f93ae04ecd675d42",
              "status": "affected",
              "version": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
              "versionType": "git"
            },
            {
              "lessThan": "ea777dc90ab37e64fa4b92f6fcf3b5edcef5e058",
              "status": "affected",
              "version": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
              "versionType": "git"
            },
            {
              "lessThan": "f6143ae109df56d51d5536e813deb19eee7a6205",
              "status": "affected",
              "version": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
              "versionType": "git"
            },
            {
              "lessThan": "58108f05b0502448f6bb612ee2eccc63bd6449cb",
              "status": "affected",
              "version": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
              "versionType": "git"
            },
            {
              "lessThan": "16d464013ec2267b00a83f4bfbb97b3ecc63bfa7",
              "status": "affected",
              "version": "0fabd2aa199faeb8754aee94658f2c48ccb2c8c3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_nat_bpf.c",
            "net/netfilter/nf_nat_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "lessThan": "6.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "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: bpf: reject invalid NAT manipulation types\n\nAs bpf_ct_set_nat_info() is not validating the NAT manipulation type a\nwrong value can be passed directly to nf_nat_setup_info(). This triggers\nthe WARN_ON() at nf_nat_setup_info() and if panic_on_warn isn\u0027t set,\nthen IPS_SRC_NAT_DONE is set without adding nat_bysource and conntrack\ncleanup tries to unlink an uninitialized hlist node.\n\nFix this by checking that NAT manipulation type is correct before\ncalling nf_nat_setup_info(). In addition, if the WARN_ON is hit, return\nNF_DROP instead of continuing with the processing to avoid similar\nsituations in the future."
    }
  ],
  "id": "CVE-2026-98793",
  "lastModified": "2026-10-30T13:21:28.133",
  "metrics": {},
  "published": "2026-10-18T16:17:33.287",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/16d464013ec2267b00a83f4bfbb97b3ecc63bfa7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/58108f05b0502448f6bb612ee2eccc63bd6449cb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/752492947be3123ea6c689e2f93ae04ecd675d42"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ce7b41f0e4b5db0580d0a2059a0c9e672b461b5e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ea777dc90ab37e64fa4b92f6fcf3b5edcef5e058"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f6143ae109df56d51d5536e813deb19eee7a6205"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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