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CVE-2026-72450

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: xfrm: validate selector family and prefixlen during match syzbot reported a shift-out-of-bounds in xfrm_selector_match() due to…

Published Aug 15, 2026EPSS 0.18%

Overview

CVE-2026-72450 is a high-severity vulnerability. It was published on August 15, 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:

xfrm: validate selector family and prefixlen during match

syzbot reported a shift-out-of-bounds in xfrm_selector_match()

due to AF_UNSPEC selector with large prefixlen (e.g. 128) matched

against IPv4 flow (when XFRM_STATE_AF_UNSPEC is set).

Fix this by:

- Rejecting mismatched families in xfrm_selector_match.

- Returning false in addr4_match if prefixlen > 32.

- Returning false in addr_match if prefixlen > 128 (prevents overflow).

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/40f0b1047918539f0b0f795ac65e35336b4c2c78Refgit.kernel.org/stable/c/5a03a2ee17e8259dde631ed84fd8322db06cb2aeRefgit.kernel.org/stable/c/6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfeRefgit.kernel.org/stable/c/78783fefdc8f36879b1a17efa0d3195ea5f2dc5fRefgit.kernel.org/stable/c/87a5bbccc7ff4edb3f42fea387124237d2ba91eeRefgit.kernel.org/stable/c/a3968ad4195d72c8fddcc6c0ef39da95ac98711aRefgit.kernel.org/stable/c/bd7f202cf77556cff59f68dc30e4cdf40cb6e33bRefgit.kernel.org/stable/c/efa9e3b9f3dea2e1ea4c7edf4edc863faef85986

How CyberStrike helps

Frequently asked questions

What is CVE-2026-72450?

CVE-2026-72450 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-72450?

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-2026-72450?

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-2026-72450?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-72450 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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