Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-64414

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: netfilter: handle unreadable frags sashiko reports: When an skb with unreadable fragments (such as from devmem TCP, where skb…

Published Jul 25, 2026EPSS 0.63%

Overview

CVE-2026-64414 is a high-severity vulnerability. It was published on July 25, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

netfilter: handle unreadable frags

sashiko reports:

When an skb with unreadable fragments (such as from devmem TCP, where

skb_frags_readable(skb) returns false) is processed by the u32 module,

skb_copy_bits() will safely return a negative error code [..]

xt_u32: bail out with hotdrop in this case.

gather_frags: return -1, just as if we had no fragment header.

nfnetlink_queue: restrict to the linear part.

nfnetlink_log: restrict to the linear part.

v2:

- skb_zerocopy helpers don't copy readable flag, i.e. nfnetlink_queue

is broken too

xt_u32 shouldn't return true if hotdrop was set.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/3b13e7635795394705920cca1e1db7e4ca2e334bRefgit.kernel.org/stable/c/57056be3ec12e7d9ecd20a60d4060f510e4f284cRefgit.kernel.org/stable/c/da5b58478a9c1b85608c9e40a3b8432d071b409eRefgit.kernel.org/stable/c/fc5bfe63bacf8a3ae307b62b34206406ca733354

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64414?

CVE-2026-64414 is a high-severity vulnerability. It was published on July 25, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-64414?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-64414?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-64414?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64414 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999