CVE-2026-46154: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-xcff-q6mv-v46w
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CVSS 7.0
CWE-416
Published
Advisory Summary

CVE-2026-46154 is a HIGH (CVSS 7.0) security vulnerability vulnerability (CWE-416: Use After Free) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-46154 at a Glance

CVE Identifier CVE-2026-46154
GHSA Identifier GHSA-xcff-q6mv-v46w
Severity HIGH
CVSS v3.1 Base Score 7.0
CWE Classification CWE-416: Use After Free
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Local (AV:L)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-46154

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-46154, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-416: Use After Free, where the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

References

NVD — CVE-2026-46154 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46154
git.kernel.org/stable/c/0f54f63555... WEB
https://git.kernel.org/stable/c/0f54f6355575971673d8aac7da107ec4178e45bd
git.kernel.org/stable/c/80afd4c84b... WEB
https://git.kernel.org/stable/c/80afd4c84bc8f5e80145ce35279f5ce53f6043db
git.kernel.org/stable/c/ce9aaa3af4... WEB
https://git.kernel.org/stable/c/ce9aaa3af445c391735c9d000c4db60dfd5640d4

Frequently Asked Questions

What is CVE-2026-46154?
CVE-2026-46154 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-416: Use After Free.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-46154?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-46154?
CVE-2026-46154 has a CVSS v3.1 base score of 7.0 (HIGH) with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-46154?
CVE-2026-46154 is classified under CWE-416: Use After Free (The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.).
How can I check Maven dependencies for CVE-2026-46154?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
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  "schema_version" : "1.4.0",
  "id" : "GHSA-xcff-q6mv-v46w",
  "modified" : "2026-05-30T12:30:25Z",
  "published" : "2026-05-28T12:30:31Z",
  "aliases" : [ "CVE-2026-46154" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Read scx_root under scx_cgroup_ops_rwsem in cgroup setters\n\nscx_group_set_{weight,idle,bandwidth}() cache scx_root before acquiring\nscx_cgroup_ops_rwsem, so the pointer can be stale by the time the op runs.\nIf the loaded scheduler is disabled and freed (via RCU work) and another is\nenabled between the naked load and the rwsem acquire, the reader sees\nscx_cgroup_enabled=true (the new scheduler's) but dereferences the freed one\n- UAF on SCX_HAS_OP(sch, ...) / SCX_CALL_OP(sch, ...).\n\nscx_cgroup_enabled is toggled only under scx_cgroup_ops_rwsem write\n(scx_cgroup_{init,exit}), so reading scx_root inside the rwsem read section\ncorrelates @sch with the enabled snapshot.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0f54f6355575971673d8aac7da107ec4178e45bd"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/80afd4c84bc8f5e80145ce35279f5ce53f6043db"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ce9aaa3af445c391735c9d000c4db60dfd5640d4"
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  "database_specific" : {
    "cwe_ids" : [ "CWE-416" ],
    "severity" : "HIGH",
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    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-28T10:16:31Z"
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}