CVE-2026-31436: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-j9j9-688w-mvpv
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CVSS 9.8
CWE-758 CWE-476
Published
Advisory Summary

CVE-2026-31436 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses an api function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-31436 at a Glance

CVE Identifier CVE-2026-31436
GHSA Identifier GHSA-j9j9-688w-mvpv
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2026-31436

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-2026-31436, 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-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior, where the product uses an api function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity. 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: dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc() At the end of this function, d is the traversal cursor of flist, but the code completes found instead. This can lead to issues such as NULL pointer dereferences, double completion, or descriptor leaks. Fix this by completing d instead of found in the final list_for_each_entry_safe() loop.

References

NVD — CVE-2026-31436 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31436
git.kernel.org/stable/c/0e4f43779d... WEB
https://git.kernel.org/stable/c/0e4f43779d550e559be13a5cdb763bad92c4cc99
git.kernel.org/stable/c/82656e8daf... WEB
https://git.kernel.org/stable/c/82656e8daf8de00935ae91b91bed43f4d6e0d644
git.kernel.org/stable/c/e1c9866173... WEB
https://git.kernel.org/stable/c/e1c9866173c5f8521f2d0768547a01508cb9ff27
git.kernel.org/stable/c/e21da2ad88... WEB
https://git.kernel.org/stable/c/e21da2ad8844585040fe4b82be1ad2fe99d40074

Frequently Asked Questions

What is CVE-2026-31436?
CVE-2026-31436 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-31436?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-31436?
CVE-2026-31436 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-31436?
CVE-2026-31436 is classified under CWE-758: Reliance on Undefined, Unspecified, or Implementation-Defined Behavior (The product uses an API function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity.).
How can I check Maven dependencies for CVE-2026-31436?
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-j9j9-688w-mvpv",
  "modified" : "2026-04-27T15:30:37Z",
  "published" : "2026-04-22T15:31:40Z",
  "aliases" : [ "CVE-2026-31436" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()\n\nAt the end of this function, d is the traversal cursor of flist, but the\ncode completes found instead. This can lead to issues such as NULL pointer\ndereferences, double completion, or descriptor leaks.\n\nFix this by completing d instead of found in the final\nlist_for_each_entry_safe() loop.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-31436"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0e4f43779d550e559be13a5cdb763bad92c4cc99"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/82656e8daf8de00935ae91b91bed43f4d6e0d644"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e1c9866173c5f8521f2d0768547a01508cb9ff27"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e21da2ad8844585040fe4b82be1ad2fe99d40074"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-476", "CWE-758" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-04-22T14:16:36Z"
  }
}