Vulnerability-Lookup

GHSA-G33V-6845-Q9PX

Vulnerability from github – Published: 2026-10-18 18:32 – Updated: 2026-10-30 15:34

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98793"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-18T16:17:33Z",
    "severity": null
  },
  "details": "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": "GHSA-g33v-6845-q9px",
  "modified": "2026-10-30T15:34:02Z",
  "published": "2026-10-18T18:32:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98793"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16d464013ec2267b00a83f4bfbb97b3ecc63bfa7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58108f05b0502448f6bb612ee2eccc63bd6449cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/752492947be3123ea6c689e2f93ae04ecd675d42"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce7b41f0e4b5db0580d0a2059a0c9e672b461b5e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea777dc90ab37e64fa4b92f6fcf3b5edcef5e058"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6143ae109df56d51d5536e813deb19eee7a6205"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98793 (GCVE-0-2026-98793)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:48 – Updated: 2026-10-30 12:39

Title

netfilter: bpf: reject invalid NAT manipulation types

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.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6820 records in the last 180 days details

References

6 references

URL	Tags
https://git.kernel.org/stable/c/ce7b41f0e4b5db058…
https://git.kernel.org/stable/c/752492947be3123ea…
https://git.kernel.org/stable/c/ea777dc90ab37e64f…
https://git.kernel.org/stable/c/f6143ae109df56d51…
https://git.kernel.org/stable/c/58108f05b0502448f…
https://git.kernel.org/stable/c/16d464013ec2267b0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0fabd2aa199faeb8754aee94658f2c48ccb2c8c3 , < ce7b41f0e4b5db0580d0a2059a0c9e672b461b5e (git) Affected: 0fabd2aa199faeb8754aee94658f2c48ccb2c8c3 , < 752492947be3123ea6c689e2f93ae04ecd675d42 (git) Affected: 0fabd2aa199faeb8754aee94658f2c48ccb2c8c3 , < ea777dc90ab37e64fa4b92f6fcf3b5edcef5e058 (git) Affected: 0fabd2aa199faeb8754aee94658f2c48ccb2c8c3 , < f6143ae109df56d51d5536e813deb19eee7a6205 (git) Affected: 0fabd2aa199faeb8754aee94658f2c48ccb2c8c3 , < 58108f05b0502448f6bb612ee2eccc63bd6449cb (git) Affected: 0fabd2aa199faeb8754aee94658f2c48ccb2c8c3 , < 16d464013ec2267b00a83f4bfbb97b3ecc63bfa7 (git)
Linux	Linux	Affected: 6.1 Unaffected: 0 , < 6.1 (semver) Unaffected: 6.1.191 , ≤ 6.1.* (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.113 , ≤ 6.12.* (semver) Unaffected: 6.18.56 , ≤ 6.18.* (semver) Unaffected: 7.2.10 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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