Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-74668

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: packet: use consistent hard_header_len in TX_RING send path tpacket_snd() reads dev->hard_header_len independently for skb allo…

Published Aug 22, 2026EPSS 0.13%

Overview

CVE-2026-74668 is a high-severity vulnerability. It was published on August 22, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

packet: use consistent hard_header_len in TX_RING send path

tpacket_snd() reads dev->hard_header_len independently for skb

allocation and header construction in tpacket_fill_skb(). Concurrent

netdevice reconfiguration can therefore make the reserved headroom

smaller than the amount later pushed, or make copylen - hard_header_len

negative.

Snapshot hard_header_len once before processing ring frames and use it

for the frame limit, headroom allocation, copy length, and skb

construction. Pass the snapshot to tpacket_fill_skb().

The separate SOCK_DGRAM consistency problem between hard_header_len and

header_ops->create is not addressed here.

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/016763e829cac37b3234eace86fd0a4c560de4a7Refgit.kernel.org/stable/c/21b5953e7494c16a42e6cd8cf110e18d13ae4a6bRefgit.kernel.org/stable/c/27e068d1b35dbec10a3cf268887c94407be4badcRefgit.kernel.org/stable/c/2a73b2c37ee3060a880b53cd24783d93fc7be5f8Refgit.kernel.org/stable/c/9c7e8ff48c377bef18c3d178748aea0575b69edeRefgit.kernel.org/stable/c/d48ea5c9c4c34dc0df621f0e39ed3a16b644621aRefgit.kernel.org/stable/c/d85d2fd54e901637c81d847811e03c662aee13cdRefgit.kernel.org/stable/c/e79f59a8527a49078cfaf8fe8fb5fcefc20c76d2

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74668?

CVE-2026-74668 is a high-severity vulnerability. It was published on August 22, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-74668?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-74668?

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-2026-74668?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74668 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