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CVE-2026-64226

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path In scx_root_enable_workfn(), put_task_struct(p) is called be…

Published Jul 24, 2026CWE-416EPSS 0.18%

Overview

CVE-2026-64226 is a high-severity vulnerability. It was published on July 24, 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:

sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path

In scx_root_enable_workfn(), put_task_struct(p) is called before scx_error()

dereferences p->comm and p->pid. If the iterator's reference is the last

drop, the task is freed synchronously and the deref becomes a UAF.

Move put_task_struct() past scx_error().

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/45c7c4e3db8b700307313c035ea08be829a7f21bRefgit.kernel.org/stable/c/57e19ba3f58a67eb924022a5a60b67fd08e5cbbdRefgit.kernel.org/stable/c/9a415cc53711f2238e0f0ca8a6bcc796c003b127Refgit.kernel.org/stable/c/cf396941901858b0de426cdcd3974eea6a02c98c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64226?

CVE-2026-64226 is a high-severity vulnerability. It was published on July 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-64226?

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-2026-64226?

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-2026-64226?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64226 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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