CVE-2025-40300: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-x8qw-46ww-c957
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CVSS 5.5
Published
Advisory Summary

CVE-2025-40300 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2025-40300 at a Glance

CVE Identifier CVE-2025-40300
GHSA Identifier GHSA-x8qw-46ww-c957
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification General Security Weakness
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-2025-40300

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-2025-40300, 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 General Security Weakness. 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: x86/vmscape: Add conditional IBPB mitigation VMSCAPE is a vulnerability that exploits insufficient branch predictor isolation between a guest and a userspace hypervisor (like QEMU). Existing mitigations already protect kernel/KVM from a malicious guest. Userspace can additionally be protected by flushing the branch predictors after a VMexit. Since it is the userspace that consumes the poisoned branch predictors, conditionally issue an IBPB after a VMexit and before returning to userspace. Workloads that frequently switch between hypervisor and userspace will incur the most overhead from the new IBPB. This new IBPB is not integrated with the existing IBPB sites. For instance, a task can use the existing speculation control prctl() to get an IBPB at context switch time. With this implementation, the IBPB is doubled up: one at context switch and another before running userspace. The intent is to integrate and optimize these cases post-embargo. [ dhansen: elaborate on suboptimal IBPB solution ]

References

NVD — CVE-2025-40300 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-40300
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
git.kernel.org/stable/c/f866eef8d1... WEB
https://git.kernel.org/stable/c/f866eef8d1c65504d30923c3f14082ad294d0e6d
git.kernel.org/stable/c/d7ddc93392... WEB
https://git.kernel.org/stable/c/d7ddc93392e4a7ffcccc86edf6ef3e64c778db52
git.kernel.org/stable/c/d5490dfa35... WEB
https://git.kernel.org/stable/c/d5490dfa35427a2967e00a4c7a1b95fdbc8ede34
git.kernel.org/stable/c/c08192b5d6... WEB
https://git.kernel.org/stable/c/c08192b5d6730a914dee6175bc71092ee6a65f14
git.kernel.org/stable/c/ac60717f9a... WEB
https://git.kernel.org/stable/c/ac60717f9a8d21c58617d0b34274babf24135835
git.kernel.org/stable/c/9c23a90648... WEB
https://git.kernel.org/stable/c/9c23a90648e831d611152ac08dbcd1283d405e7f
git.kernel.org/stable/c/893387c186... WEB
https://git.kernel.org/stable/c/893387c18612bb452336a5881da0d015a7e8f4a2
git.kernel.org/stable/c/510603f504... WEB
https://git.kernel.org/stable/c/510603f504796c3535f67f55fb0b124a303b44c8
git.kernel.org/stable/c/459274c77b... WEB
https://git.kernel.org/stable/c/459274c77b37ac63b78c928b4b4e748d1f9d05c8
git.kernel.org/stable/c/34e5667041... WEB
https://git.kernel.org/stable/c/34e5667041050711a947e260fc9ebebe08bddee5
git.kernel.org/stable/c/2f8f173413... WEB
https://git.kernel.org/stable/c/2f8f173413f1cbf52660d04df92d0069c4306d25
git.kernel.org/stable/c/2f4f2f8f86... WEB
https://git.kernel.org/stable/c/2f4f2f8f860cb4c3336a7435ebe8dcfded0c9c6e
git.kernel.org/stable/c/15006289e5... WEB
https://git.kernel.org/stable/c/15006289e5c38b2a830e1fba221977a27598176c
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-457936.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-032379.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2025/11/14/3
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2025/11/14/4
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2025/11/14/6
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2025/11/17/2
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2025/11/17/3

Frequently Asked Questions

What is CVE-2025-40300?
CVE-2025-40300 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2025-40300?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2025-40300?
CVE-2025-40300 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-2025-40300?
CVE-2025-40300 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2025-40300?
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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