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CVE-2026-53270

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ipvs: clear the svc scheduler ptr early on edit ip_vs_edit_service() while unbinding the old scheduler clears the svc->schedule…

Published Jun 25, 2026EPSS 0.12%

Overview

CVE-2026-53270 is a high-severity vulnerability. It was published on June 25, 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:

ipvs: clear the svc scheduler ptr early on edit

ip_vs_edit_service() while unbinding the old scheduler clears

the svc->scheduler ptr after the scheduler module initiates

RCU callbacks. This can cause packets to use the old

scheduler at the time when svc->sched_data is already freed

after RCU grace period.

Fix it by clearing the ptr early in ip_vs_unbind_scheduler(),

before the done_service method schedules any RCU callbacks.

Also, if the new scheduler fails to initialize when replacing

the old scheduler, try to restore the old scheduler while still

returning the error code.

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/14e4689c113b4c06af1069364ade24fdd7055f33Refgit.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9bRefgit.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03Refgit.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3Refgit.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5Refgit.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69Refgit.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06Refgit.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53270?

CVE-2026-53270 is a high-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-53270?

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-2026-53270?

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-2026-53270?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53270 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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