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CVE-2026-52985

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: netdevsim: zero initialize struct iphdr in dummy sk_buff Syzbot reports a KMSAN uninit-value originating from nsim_dev_trap_skb…

Published Jun 24, 2026CWE-908EPSS 0.12%

Overview

CVE-2026-52985 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

netdevsim: zero initialize struct iphdr in dummy sk_buff

Syzbot reports a KMSAN uninit-value originating from

nsim_dev_trap_skb_build, with the allocation also

being performed in the same function.

Fix this by calling skb_put_zero instead of skb_put to

guarantee zero initialization of the whole IP header.

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/175556c049eaec14efde8c6475e763b7579b9de7Refgit.kernel.org/stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7Refgit.kernel.org/stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591Refgit.kernel.org/stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0Refgit.kernel.org/stable/c/750d0091bebf44975421268d37484ef87060d263Refgit.kernel.org/stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4Refgit.kernel.org/stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490Refgit.kernel.org/stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2

How CyberStrike helps

Frequently asked questions

What is CVE-2026-52985?

CVE-2026-52985 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-52985?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-52985?

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-2026-52985?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-52985 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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