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NVD / CVE Program· CNA Linux

CVE-2026-90061: netfilter: nf_tables: skip double clone set expressions on element insert

—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 04d1930072e694d9d03bfefdb7e1ebdc872a3d0c, 109bf28a90ac365ec4d25622c50959bb43b35ed4, 1e7fb6801d9cc826adcdb7fa0533c397730657f2.

Low priority for now. Upgrade to Linux Linux 04d1930072e694d9d03bfefdb7e1ebdc872a3d0c, 109bf28a90ac365ec4d25622c50959bb43b35ed4, 1e7fb6801d9cc826adcdb7fa0533c397730657f2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: skip double clone set expressions on element insert Both the dynset and newsetelem path clone the existing set expressions when setting set element expressions if no override expressions are provided. This results in a double clone, once to clone the template set expressions then another clone on the new element. Add a flag to annotate if userspace provides a override expression (ie. expression of the same type of the set but different configuration), otherwise borrow the existing expression from the set. Add conditionals to release expression iif they represent an override. Use this new override_exprs flag to dump the dynset expression override to userspace. This simplifies the existing logic and it also fixes a bug with the connlimit expression which results in a module refcount imbalance WARNING splat when resorting on the default set expressions.

Published
Sep 17, 2026
Updated
Oct 30, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.7affected
    • 65038428b2c6c5be79d3f78a6b79c0cdc3a58a41 and later · before 109bf28a90ac365ec4d25622c50959bb43b35ed4affected · git
    • 65038428b2c6c5be79d3f78a6b79c0cdc3a58a41 and later · before 9cbf6da967ec8c6e8278b70353b712980a12d848affected · git
    • 65038428b2c6c5be79d3f78a6b79c0cdc3a58a41 and later · before 04d1930072e694d9d03bfefdb7e1ebdc872a3d0caffected · git
    • 65038428b2c6c5be79d3f78a6b79c0cdc3a58a41 and later · before c6b56b8d549a043b6c8ff616db8748263eae05aeaffected · git
    • 65038428b2c6c5be79d3f78a6b79c0cdc3a58a41 and later · before 1e7fb6801d9cc826adcdb7fa0533c397730657f2affected · git
    • 65038428b2c6c5be79d3f78a6b79c0cdc3a58a41 and later · before 43559058d21e0493aa220ac167e0279334dea5f9affected · git
    • before 5.7not affected · semver
    • 6.1.191 and later · up to and including 6.1.*not affected · semver
    • 6.6.160 and later · up to and including 6.6.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.115-26.12.115-2
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-90059Sep 17, 2026 · net: stmmac: restore NET_IP_ALIGN in the RX DMA offset
    30Monitor
  • ← EarlierCVE-2026-90060Sep 17, 2026 · ALSA: control: Don't add invalid kcontrols to LED layer
    0Monitor
  • Later →CVE-2026-90062Sep 17, 2026 · netfilter: nf_tables: move hardware offload step after building the chain blob
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux04d1930072e694d9d03bfefdb7e1ebdc872a3d0cVendor (CNA)
Linux Linux109bf28a90ac365ec4d25622c50959bb43b35ed4Vendor (CNA)
Linux Linux1e7fb6801d9cc826adcdb7fa0533c397730657f2Vendor (CNA)
Linux Linux43559058d21e0493aa220ac167e0279334dea5f9Vendor (CNA)
Linux Linux9cbf6da967ec8c6e8278b70353b712980a12d848Vendor (CNA)
Linux Linuxc6b56b8d549a043b6c8ff616db8748263eae05aeVendor (CNA)
debian:linux6.12.115-2 · Debian:13Package registry (OSV)
debian:linux7.2.6-1 · Debian:14Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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