What is CVE-2026-53131?

CVE-2026-53131 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.4 out of 10, affecting Linux kernel versions from 2.6.12 onward and patched in 5.15.210, 6.1.176, 6.6.143 and others. CVE-2026-53131 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53131?

CVE-2026-53131 has a CVSS score of 9.4 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H.

Is there a patch available for CVE-2026-53131?

Yes, CVE-2026-53131 has been patched. Fixed versions include 5.15.210, 6.1.176, 6.6.143 and others. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53131 actively exploited?

CVE-2026-53131 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-53131

Critical

In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() `ip6t_eui64`, `xt_mac`, the `bitmap:ip,mac`, `hash:ip,mac`, and `hash:mac` ipset types, and `nf_log_syslog` access `eth_hdr(skb)` after either assuming that the skb is associated with an Ethernet device or checking only that the `ETH_HLEN` bytes at `skb_mac_header(skb)` lie between `skb->head` and `skb->data`. 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 `eth_hdr(skb)`.

Package Linux Kernel

Published 2026-06-25

Last modified 2026-07-06

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.4

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

High

Vector string

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

Affected versions

Linux kernel versions 2.6.12 and later are affected. Fixed in 5.15.210, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1 and their respective stable series.

Affected from

≥ 2.6.12

Fixed in

✓ 5.15.210 5.15.x ✓ 6.1.176 6.1.x ✓ 6.6.143 6.6.x ✓ 6.12.94 6.12.x ✓ 6.18.36 6.18.x ✓ 7.0.13 7.0.x ✓ 7.1

References

7 total

Kernel Git
https://git.kernel.org/stable/c/063f43361e884acd7300790e90194430275d0d0c

Patch
Kernel Git
https://git.kernel.org/stable/c/367abcacc13a8e2e7624408b7f593bd1e60e49d9

Patch
Kernel Git
https://git.kernel.org/stable/c/4435888e1bf139d2bfe5911643d4217382136743

Patch
Kernel Git
https://git.kernel.org/stable/c/5d634afb8b83b49de562792fd0d047416a43bd4d

Patch
Kernel Git
https://git.kernel.org/stable/c/62443dc21114c0bbc476fa62973db89743f2f137

Patch

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2026-53131

Severity Critical

CVSS score 9.4 / 10

CVSS version 3.1

Published 2026-06-25

Modified 2026-07-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53131?

CVE-2026-53131 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.4 out of 10 . It affects Linux kernel versions from 2.6.12 onward and has been patched in 5.15.210, 6.1.176, 6.6.143 and others. CVE-2026-53131 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53131?

CVE-2026-53131 has a CVSS score of 9.4 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H.
Is there a patch available for CVE-2026-53131?

Yes. CVE-2026-53131 has been patched. Fixed versions include 5.15.210, 6.1.176, 6.6.143 and others. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53131 actively exploited?

No. CVE-2026-53131 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.