CVE-2026-45838: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-x78h-gf69-p5j6
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CVSS 5.5
CWE-476
Published
Advisory Summary

CVE-2026-45838 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (CWE-476: NULL Pointer Dereference) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product dereferences a pointer that it expects to be valid but is null.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-45838 at a Glance

CVE Identifier CVE-2026-45838
GHSA Identifier GHSA-x78h-gf69-p5j6
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-476: NULL Pointer Dereference
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

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

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

How to Fix CVE-2026-45838

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-2026-45838, 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-476: NULL Pointer Dereference, where the product dereferences a pointer that it expects to be valid but is null. 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: bpf: fix end-of-list detection in cgroup_storage_get_next_key() list_next_entry() never returns NULL -- when the current element is the last entry it wraps to the list head via container_of(). The subsequent NULL check is therefore dead code and get_next_key() never returns -ENOENT for the last element, instead reading storage->key from a bogus pointer that aliases internal map fields and copying the result to userspace. Replace it with list_entry_is_head() so the function correctly returns -ENOENT when there are no more entries.

References

NVD — CVE-2026-45838 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45838
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-784472.html
git.kernel.org/stable/c/0f3d9dd5e1... WEB
https://git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3
git.kernel.org/stable/c/26d3339e46... WEB
https://git.kernel.org/stable/c/26d3339e465e54107bd85884341d1609c5300d6a
git.kernel.org/stable/c/2c88b2d96e... WEB
https://git.kernel.org/stable/c/2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6
git.kernel.org/stable/c/32ce55d424... WEB
https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377
git.kernel.org/stable/c/5828b9e5b2... WEB
https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7
git.kernel.org/stable/c/85a2f30e40... WEB
https://git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49af
git.kernel.org/stable/c/b4b5a20bed... WEB
https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0b
git.kernel.org/stable/c/fc39753b7f... WEB
https://git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81f

Frequently Asked Questions

What is CVE-2026-45838?
CVE-2026-45838 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-476: NULL Pointer Dereference.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-45838?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-45838?
CVE-2026-45838 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-45838?
CVE-2026-45838 is classified under CWE-476: NULL Pointer Dereference (The product dereferences a pointer that it expects to be valid but is NULL.).
How can I check Maven dependencies for CVE-2026-45838?
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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  "id" : "GHSA-x78h-gf69-p5j6",
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  "published" : "2026-05-27T12:31:23Z",
  "aliases" : [ "CVE-2026-45838" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix end-of-list detection in cgroup_storage_get_next_key()\n\nlist_next_entry() never returns NULL -- when the current element is the\nlast entry it wraps to the list head via container_of(). The subsequent\nNULL check is therefore dead code and get_next_key() never returns\n-ENOENT for the last element, instead reading storage->key from a bogus\npointer that aliases internal map fields and copying the result to\nuserspace.\n\nReplace it with list_entry_is_head() so the function correctly returns\n-ENOENT when there are no more entries.",
  "severity" : [ {
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    "url" : "https://git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3"
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  "database_specific" : {
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    "nvd_published_at" : "2026-05-27T11:16:23Z"
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}