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CVE-2026-45917

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ipvs: do not keep dest_dst if dev is going down There is race between the netdev notifier ip_vs_dst_event() and the code that c…

Published May 27, 2026EPSS 0.16%

Overview

CVE-2026-45917 is a medium-severity vulnerability. It was published on May 27, 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:

ipvs: do not keep dest_dst if dev is going down

There is race between the netdev notifier ip_vs_dst_event()

and the code that caches dst with dev that is going down.

As the FIB can be notified for the closed device after our

handler finishes, it is possible valid route to be returned

and cached resuling in a leaked dev reference until the dest

is not removed.

To prevent new dest_dst to be attached to dest just after the

handler dropped the old one, add a netif_running() check

to make sure the notifier handler is not currently running

for device that is closing.

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/024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3eRefgit.kernel.org/stable/c/64af43033503458c46023e56d6ae7bb0f824b55fRefgit.kernel.org/stable/c/8fde939b0206afc1d5846217a01a16b9bc8c7896Refgit.kernel.org/stable/c/bae53b3baf2ff2f45f9205c438818fc055601a54

How CyberStrike helps

Frequently asked questions

What is CVE-2026-45917?

CVE-2026-45917 is a medium-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-45917?

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-2026-45917?

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-2026-45917?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-45917 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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