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CVE-2026-46154

7.0 · HIGH

In the Linux kernel, the following vulnerability has been resolved: sched_ext: Read scx_root under scx_cgroup_ops_rwsem in cgroup setters scx_group_set_{weight,idle,bandwidth}() cache scx_root be…

Published May 28, 2026CWE-416EPSS 0.15%

Overview

CVE-2026-46154 is a high-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.0, 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: Read scx_root under scx_cgroup_ops_rwsem in cgroup setters

scx_group_set_{weight,idle,bandwidth}() cache scx_root before acquiring

scx_cgroup_ops_rwsem, so the pointer can be stale by the time the op runs.

If the loaded scheduler is disabled and freed (via RCU work) and another is

enabled between the naked load and the rwsem acquire, the reader sees

scx_cgroup_enabled=true (the new scheduler's) but dereferences the freed one

- UAF on SCX_HAS_OP(sch, ...) / SCX_CALL_OP(sch, ...).

scx_cgroup_enabled is toggled only under scx_cgroup_ops_rwsem write

(scx_cgroup_{init,exit}), so reading scx_root inside the rwsem read section

correlates @sch with the enabled snapshot.

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/0f54f6355575971673d8aac7da107ec4178e45bdRefgit.kernel.org/stable/c/80afd4c84bc8f5e80145ce35279f5ce53f6043dbRefgit.kernel.org/stable/c/ce9aaa3af445c391735c9d000c4db60dfd5640d4

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46154?

CVE-2026-46154 is a high-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 7.0 (HIGH).

How severe is CVE-2026-46154?

This vulnerability has a CVSS 3.1 base score of 7.0, 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-2026-46154?

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-2026-46154?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46154 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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