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 · corrected/updated Oct 15, 2026 · Canonical Ubuntu · evidence confidence high
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
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-53131 is a critical public vulnerability record for Canonical Ubuntu. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether Canonical Ubuntu is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: linux/linux kernel; linux/linux kernel (2.6.12). Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 9.4, EPSS 0.4%. It is not currently listed in the CISA Known Exploited catalog. Sources contributing to this record: cve_org, epss, nvd, ubuntu. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in the CISA KEV catalog.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Technology hubs
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
Affected
- cpe linux/linux kernelversion unspecified
- cpe linux/linux kernel2.6.12
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 - 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