CVE Tools
Track your stack

CVE-2026-98320

netfilter: flowtable: hold reference on ct until flow is released

No known exploitation. EPSS puts it in the 3rd percentile. Fixed versions are out.

CVSS 3.17.8HighEPSS percentile3rd0.1% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix1 product4 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • LinuxAffected: ≥ 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < 93ff1594be1aad4da364462dd8db050ebcfda2deUpgrade to: 93ff1594be1aad4da364462dd8db050ebcfda2deAffected: ≥ 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < eed6997e8dc40593a539fcc722e7ed51b18db86cUpgrade to: eed6997e8dc40593a539fcc722e7ed51b18db86cAffected: ≥ 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < 61c6688be282277c6e91ab286a7acd0ae8681ac6Upgrade to: 61c6688be282277c6e91ab286a7acd0ae8681ac6Affected: ≥ 0ff90b6c20340e57616a51ae1a1bf18156d6638a, < a43cd2b67b91e943273c913237a7a88c50cdcfbcUpgrade to: a43cd2b67b91e943273c913237a7a88c50cdcfbc + 4 more branchesStated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: hold reference on ct until flow is released nf_ct_put() releases the ct->ext area inmediately, the rcu typesafe semantics also allow to refer to the wrong conntrack from the flowtable datapath. Hold reference on ct until flow is released after rcu grace period. Add rcu_barrier() on module exit path, to ensure pending flow entries are release before module goes away.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS3rd
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.1% chance of exploitation activity in the next 30 days, which ranks it in the 3rd percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

3 events over 1 day, from the signal feeds we watch.

  1. Record updated
  2. Publishedrecord updated

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Scored 7.8 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Sources

References in the record

And 5 more references. See all after sign-in

In the news

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next serious one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Linux, not every advisory.