CVE-2026-53131: netfilter: require Ethernet MAC header before using eth_hdr()
Published Jun 25, 2026
·Updated
In the Linux kernel, the following vulnerability has been resolved:
Affected Software
14 affected componentsFixes available
Linux Linux kernel
Microsoft azl3 kernel 6.6.143.1-1
Linux Linux kernel>=2.6.12.1<5.15.210
Linux Linux kernel>=5.16<6.1.176
Linux Linux kernel>=6.2<6.6.143
Linux Linux kernel>=6.7<6.12.94
Linux Linux kernel>=6.13<6.18.36
Linux Linux kernel>=6.19<7.0.13
Linux Linux kernel=2.6.12
Linux Linux kernel=2.6.12-rc2
Linux Linux kernel=2.6.12-rc3
Linux Linux kernel=2.6.12-rc4
Linux Linux kernel=2.6.12-rc5
debian/linux
6.1.176-16.1.187-16.12.107-16.12.111-17.2.6-17.2.8-1
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.187-1Fixed in 6.12.107-1Fixed in 6.12.111-1Fixed in 7.2.6-1Fixed in 7.2.8-1
Event History
Jun 25, 2026
CVE Published
via MITRE·08:38 AM
Data Sourced
via MITRE·08:38 AM
DescriptionSeverity
Data Sourced
via NVD·09:16 AM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Red Hat·10:03 AM
DescriptionSeverityAffected Software
Jun 27, 2026
Data Sourced
via Microsoft·08:10 AM
DescriptionSeverityWeaknessAffected Software
Aug 13, 2026
Data Sourced
via Launchpad·08:41 PM
Description
Sep 29, 2026
Data Sourced
via Debian·10:52 AM
DescriptionAffected Software
Oct 1, 2026
Data Sourced
via Ubuntu·10:52 AM
RemedyDescriptionSeverityAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-53131?
CVE-2026-53131 has a critical severity score of 9.4.
2
How do I fix CVE-2026-53131?
To fix CVE-2026-53131, apply the available patches for the Linux kernel.
3
What systems are affected by CVE-2026-53131?
CVE-2026-53131 affects the Linux kernel and Microsoft azl3 kernel version 6.6.143.1-1.
4
What does CVE-2026-53131 exploit?
CVE-2026-53131 exploits a failure to require an Ethernet MAC header before using eth_hdr() in netfilter.
5
When was CVE-2026-53131 published?
CVE-2026-53131 was published on June 25, 2026.