Vulnerability · CVE-2026-53131

In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() , , the , , and ipset types, and access after eith

Published Jun 25, 2026 · catalog updated Oct 17, 2026 · Canonical Ubuntu

Check if you run it

No confirmed exploitation is on record for CVE-2026-53131. EPSS is 0.43%. Act only if a listed version of Canonical Ubuntu is installed.

Gaps on this record

No vendor fix or required action is stored. Compare the linked advisory before you change production.

Severity: Critical9.4
Known exploitation: Not in CISA/VulnCheck KEV
EPSS: 0.43%
Remediation: Advisory link
Affected products: Ubuntu:16.04:LTS linux-hwe-edge · Ubuntu:Pro:14.04:LTS linux · Ubuntu:Pro:14.04:LTS linux-aws · Ubuntu:Pro:14.04:LTS linux-azure · Ubuntu:Pro:14.04:LTS linux-lts-xenial · Ubuntu:Pro:16.04:LTS linux

In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() , , the , , and ipset types, and access after either assuming that the skb is associated with an Ethernet device or checking only that the bytes at lie between and . Make these paths first verify that the skb is associated with an Ethernet device, that the MAC header was set, and that it spans at least a full Ethernet header before accessing .

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

Ubuntu:16.04:LTS linux-hwe-edge4.8.0-28.30~16.04.1, 4.8.0-30.32~16.04.1, 4.8.0-32.34~16.04.1
Ubuntu:Pro:14.04:LTS linux0 → 3.13.0-218.269
Ubuntu:Pro:14.04:LTS linux-aws0 → 4.4.0-1159.165
Ubuntu:Pro:14.04:LTS linux-azure0 → 4.15.0-1207.222~14.04.1
Ubuntu:Pro:14.04:LTS linux-lts-xenial0 → 4.4.0-288.322~14.04.1
Ubuntu:Pro:16.04:LTS linux0 → 4.4.0-288.322
Ubuntu:Pro:16.04:LTS linux-aws0 → 4.4.0-1197.212
Ubuntu:Pro:16.04:LTS linux-aws-hwe0 → 4.15.0-1197.210~16.04.1
Ubuntu:Pro:16.04:LTS linux-azure0 → 4.15.0-1208.223~16.04.1
Ubuntu:Pro:16.04:LTS linux-gcp0 → 4.15.0-1190.207~16.04.1
Ubuntu:Pro:16.04:LTS linux-hwe0 → 4.15.0-260.272~16.04.2
Ubuntu:Pro:16.04:LTS linux-kvm0 → 4.4.0-1160.171
cpe linux/linux kernel2.6.12

How to fix CVE-2026-53131

Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-53131. EPSS is 0.43%. Act only if a listed version of Canonical Ubuntu is installed.

Which versions are affected?

Compare what you have installed with linux/linux kernel 2.6.12. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.43%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Ubuntu security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

Jun 25, 2026 · NIST NVD
Detected
In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() , , the , , and ipset types, and access after either assuming that the skb is associated with an Ethernet device or checking only that the bytes at lie between and . Make these paths first verify that the skb is associated with an Ethernet device, that the MAC header wa
Oct 15, 2026 · NIST NVD
Updated
In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() , , the , , and ipset types, and access after either assuming that the skb is associated with an Ethernet device or checking only that the bytes at lie between and . Make these paths first verify that the skb is associated with an Ethernet device, that the MAC header wa
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux fixed in 3.13.0-218.269; linux-aws fixed in 4.4.0-1159.165; linux-azure fixed in 4.15.0-1207.222~14.04.1; linux-lts-xenial fixed in 4.4.0-288.322~14.04.1
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux fixed in 3.13.0-218.269
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux-aws fixed in 4.4.0-1159.165
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux-azure fixed in 4.15.0-1207.222~14.04.1
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux-lts-xenial fixed in 4.4.0-288.322~14.04.1
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux fixed in 4.4.0-288.322
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux-aws fixed in 4.4.0-1197.212
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux-aws-hwe fixed in 4.15.0-1197.210~16.04.1
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux-azure fixed in 4.15.0-1208.223~16.04.1
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux-gcp fixed in 4.15.0-1190.207~16.04.1
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux-hwe fixed in 4.15.0-260.272~16.04.2
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Fix available
linux-kvm fixed in 4.4.0-1160.171
Oct 17, 2026 · OpenSSF OSV / OSV Scanner
Updated
In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() , , the , , and ipset types, and access after either assuming that the skb is associated with an Ethernet device or checking only that the bytes at lie between and . Make these paths first verify that the skb is associated with an Ethernet device, that the MAC header wa

Sources

CVE.orgVulnerability recordCVE-2026-53131
Official CVE identifier
cve.org
FIRST EPSSExploitation probabilityCVE-2026-53131
30-day exploitation probability 0.4%
first.org
NIST NVDVulnerability recordCVE-2026-53131
In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() , , the , , and ipset types, and access after either assum
nvd.nist.gov
OpenSSF OSV / OSV ScannerPackage advisoryUBUNTU-CVE-2026-53131
osv.dev
Ubuntu Security NoticesVendor advisoryCVE-2026-53131
Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - S390 architecture; - IIO ADC drivers; - Multiple devices driver; - PCI subsystem; - VFIO drivers;
ubuntu.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

Priority score

26/100

Evidence confidence: High

A vendor or government advisory agrees with at least one other source.

Confirmed exploitation0/30
EPSS probability1/20
CVSS severity14/15
Public exploit0/10
Internet exposure6/10
Product prevalence5/5
Threat research0/5

Decision signals

Four separate signals — do not infer one from another.

Critical

CVSS severity
9.4 v3.1
Technical impact. Separate from exploitation likelihood.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
EPSS probability
0.43% · p36.35%
Estimated probability of exploitation within 30 days (FIRST).
Known exploitation
No verified KEV listing
Evidence from CISA KEV or VulnCheck KEV only — not from EPSS alone.
Patch availability
Advisory link
A patch or advisory reference is linked. Open the original publisher for availability by product version.

Stacks

Azure Linux Microsoft Ubuntu Ubuntu 14.04 Ubuntu 16.04

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