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CVE-2026-23245

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_gate: snapshot parameters with RCU on replace The gate action can be replaced while the hrtimer callback or dump…

Published Mar 18, 2026EPSS 0.14%

Overview

CVE-2026-23245 is a high-severity vulnerability. It was published on March 18, 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:

net/sched: act_gate: snapshot parameters with RCU on replace

The gate action can be replaced while the hrtimer callback or dump path is

walking the schedule list.

Convert the parameters to an RCU-protected snapshot and swap updates under

tcf_lock, freeing the previous snapshot via call_rcu(). When REPLACE omits

the entry list, preserve the existing schedule so the effective state is

unchanged.

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/035d0d09d5ab3ed3e93d18cde2b562a6719eea23Refgit.kernel.org/stable/c/04d75529dc0f9be78786162ebab7424af4644df2Refgit.kernel.org/stable/c/58b162e318d0243ad2d7d92456c0873f2494c351Refgit.kernel.org/stable/c/62413a9c3cb183afb9bb6e94dd68caf4e4145f4cRefgit.kernel.org/stable/c/8b1251bbf0f10ac745ed74bad4d3b433caa1eeaeRefgit.kernel.org/stable/c/dfc314d7c767e350f78a46a8f8b134f80e8ad432Refgit.kernel.org/stable/c/fc98fd8d214693be91253d9a88cdf8e5e143d124Refcert-portal.siemens.com/productcert/html/ssa-019113.htmlRefcert-portal.siemens.com/productcert/html/ssa-082556.html

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23245?

CVE-2026-23245 is a high-severity vulnerability. It was published on March 18, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-23245?

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-2026-23245?

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-2026-23245?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23245 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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