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CVE-2026-74473

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: vxlan: use pskb_network_may_pull() in route_shortcircuit() route_shortcircuit() currently calls pskb_may_pull(skb, sizeof(struc…

Published Aug 15, 2026EPSS 0.53%

Overview

CVE-2026-74473 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, 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:

vxlan: use pskb_network_may_pull() in route_shortcircuit()

route_shortcircuit() currently calls pskb_may_pull(skb, sizeof(struct iphdr))

(or ipv6hdr), which checks if bytes are available starting from skb->data.

However, in vxlan_xmit(), skb->data points to the MAC header, so

skb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, 20)

only checks 20 bytes from skb->data (which is 14 bytes MAC header + 6 bytes of

IP header), leaving the rest of the IP header potentially un-pulled in non-linear

frags. Subsequent dereferences of ip_hdr(skb)->daddr can read beyond the pulled

linear buffer length.

Fix this by using pskb_network_may_pull(), which adds skb_network_offset(skb) to

the length check to ensure the full network header is present in the linear buffer.

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/214ba43faf106cb06cd3dd30999c5c809c868b53Refgit.kernel.org/stable/c/26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fbRefgit.kernel.org/stable/c/42887be7c4cf283cce02cd0fb6411221167c8b6cRefgit.kernel.org/stable/c/4f3f96e771a20263635bb5e1307c112d613b4bbdRefgit.kernel.org/stable/c/6bd0a3a1b5744166946f0c551a6665c3b46b05e4Refgit.kernel.org/stable/c/aa0d31376d574ac858a40078431a77127bf04ee4Refgit.kernel.org/stable/c/c419af4924c1593500a40519730ed98575d04a3eRefgit.kernel.org/stable/c/ee799977d7941dbfb11049e17edd9eaf4f8820f7

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74473?

CVE-2026-74473 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-74473?

This vulnerability has a CVSS 3.1 base score of 9.8, 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-2026-74473?

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-2026-74473?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74473 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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