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  4. CVE 2026 98321 netfilter nfnat unregister and release hooks on
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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-98321

netfilter: nf_nat: unregister and release hooks on errorCVE-2026-98321

Answer in brief

CVE-2026-98321 records a Unknown severity vulnerability in netfilter: nf_nat: unregister and release hooks on error. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 6, 2026Updated Oct 6, 2026Source checked Oct 6, 2026First seen by HOL Oct 6, 2026Material review Oct 6, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=1cd472bf036ca038e783ef5f058f54e45b7e8180 <79084567cd082fb4482e1ea457580e7d6504dd99 || >=1cd472bf036ca038e783ef5f058f54e45b7e8180 <df80342f4bfc023ad7d6703df5e27f583ff0cb8d || >=1cd472bf036ca038e783ef5f058f54e45b7e8180 <cbdd39ce42530a193c56beb206a3356cb6d0101679084567cd082fb4482e1ea457580e7d6504dd99, df80342f4bfc023ad7d6703df5e27f583ff0cb8d, cbdd39ce42530a193c56beb206a3356cb6d01016
Linux/Linuxgeneric4.18Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 79084567cd082fb4482e1ea457580e7d6504dd99 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 6, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_nat: unregister and release hooks on error If nf_hook_entries_insert_raw() fails, the NAT hooks get never released, resulting in a memleak. Postpone setting nat_proto_net->nat_hook_ops when the hooks are registered to simplify the error path to decide whether the nat hooks need unwinding.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • wifi: cfg80211: get the wiphy out of a dying network namespaceSame linux/linux package
  • wifi: mac80211: unlist vifs when their netdev is unregisteredSame linux/linux package
  • wifi: mac80211: only operate on TDLS peers in the TDLS codeSame linux/linux package
  • wifi: mac80211: reset the LED state when ifup failsSame linux/linux package
  • wifi: mac80211: reset state when starting AP failsSame linux/linux package
  • wifi: mac80211: abort chanswitch when leaving a meshSame linux/linux package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 6, 2026
References
3 linked sources
Open source record