CVE-2026-31664: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-5fvv-6wpc-9mr7
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CVSS 5.5
Published
Advisory Summary

CVE-2026-31664 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-2026-31664 at a Glance

CVE Identifier CVE-2026-31664
GHSA Identifier GHSA-5fvv-6wpc-9mr7
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-2026-31664

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-2026-31664, 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: xfrm: clear trailing padding in build_polexpire() build_expire() clears the trailing padding bytes of struct xfrm_user_expire after setting the hard field via memset_after(), but the analogous function build_polexpire() does not do this for struct xfrm_user_polexpire. The padding bytes after the __u8 hard field are left uninitialized from the heap allocation, and are then sent to userspace via netlink multicast to XFRMNLGRP_EXPIRE listeners, leaking kernel heap memory contents. Add the missing memset_after() call, matching build_expire().

References

NVD — CVE-2026-31664 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31664
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-457936.html
git.kernel.org/stable/c/71a98248c6... WEB
https://git.kernel.org/stable/c/71a98248c63c535eaa4d4c22f099b68d902006d0
git.kernel.org/stable/c/a5127501c8... WEB
https://git.kernel.org/stable/c/a5127501c8d30b5728791b1e340284ca5c9cc4bd
git.kernel.org/stable/c/ac6985903d... WEB
https://git.kernel.org/stable/c/ac6985903db047eaff54db929e4bf6b06782788e
git.kernel.org/stable/c/b1dfd6b27d... WEB
https://git.kernel.org/stable/c/b1dfd6b27df35ef4f87825aa5f607378d23ff0f2
git.kernel.org/stable/c/c221ed63a2... WEB
https://git.kernel.org/stable/c/c221ed63a2769a0af8bd849dfe25740048f34ef4
git.kernel.org/stable/c/e1af65c669... WEB
https://git.kernel.org/stable/c/e1af65c669ebb1666c54576614c01a7f9ffcfff6
git.kernel.org/stable/c/e6f4ffe859... WEB
https://git.kernel.org/stable/c/e6f4ffe8596947a595c9544e73a73adcb0568b88
git.kernel.org/stable/c/eda30846ea... WEB
https://git.kernel.org/stable/c/eda30846ea54f8ed218468e5480c8305ca645e37

Frequently Asked Questions

What is CVE-2026-31664?
CVE-2026-31664 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-2026-31664?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-31664?
CVE-2026-31664 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-2026-31664?
CVE-2026-31664 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-31664?
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 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5fvv-6wpc-9mr7",
  "modified" : "2026-10-15T03:35:43Z",
  "published" : "2026-04-24T15:32:37Z",
  "aliases" : [ "CVE-2026-31664" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: clear trailing padding in build_polexpire()\n\nbuild_expire() clears the trailing padding bytes of struct\nxfrm_user_expire after setting the hard field via memset_after(),\nbut the analogous function build_polexpire() does not do this for\nstruct xfrm_user_polexpire.\n\nThe padding bytes after the __u8 hard field are left\nuninitialized from the heap allocation, and are then sent to\nuserspace via netlink multicast to XFRMNLGRP_EXPIRE listeners,\nleaking kernel heap memory contents.\n\nAdd the missing memset_after() call, matching build_expire().",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
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  }, {
    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
  }, {
    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
  }, {
    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
  }, {
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    "url" : "https://git.kernel.org/stable/c/71a98248c63c535eaa4d4c22f099b68d902006d0"
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    "type" : "WEB",
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    "url" : "https://git.kernel.org/stable/c/e6f4ffe8596947a595c9544e73a73adcb0568b88"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/eda30846ea54f8ed218468e5480c8305ca645e37"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-04-24T15:16:46Z"
  }
}