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CVE-2026-74705

10.0 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: udp: fix potential use-after-free in tunnel segmentation __skb_udp_tunnel_segment() gets the UDP header before ensuring the tun…

Published Aug 22, 2026EPSS 0.50%

Overview

CVE-2026-74705 is a critical-severity vulnerability. It was published on August 22, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. 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:

udp: fix potential use-after-free in tunnel segmentation

__skb_udp_tunnel_segment() gets the UDP header before ensuring the

tunnel header is in the skb head. If the pull reallocates skb->head,

the saved UDP header pointer is no longer valid.

Get the UDP header after the pull to avoid a potential use-after-free.

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/19d89b13a43640b2da2f277ee462d919d988cb6fRefgit.kernel.org/stable/c/1ae134c012e10384cdac420b5cc6e0615cde0b55Refgit.kernel.org/stable/c/5161e67c561c4f28a5d9335a6e859b02511de92bRefgit.kernel.org/stable/c/588d4a6795d99d080f74ef0b5f391ea8c453ae5dRefgit.kernel.org/stable/c/64d322c288577793eedd352b96ef75234ed380feRefgit.kernel.org/stable/c/6a733a38b983d8c2e222f13968209010cf44de87Refgit.kernel.org/stable/c/b3df61bb745eb5201eac22679a2839d4ccbf3442Refgit.kernel.org/stable/c/d0f86fb36eb260abd10007b62c9dcc1028e03e61

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74705?

CVE-2026-74705 is a critical-severity vulnerability. It was published on August 22, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

How severe is CVE-2026-74705?

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-74705?

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-2026-74705?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74705 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.

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