CVE-2026-31420: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-644j-vc34-vf98
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CVSS 5.5
CWE-667
Published
Advisory Summary

CVE-2026-31420 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (CWE-667: Improper Locking) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-31420 at a Glance

CVE Identifier CVE-2026-31420
GHSA Identifier GHSA-644j-vc34-vf98
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-667: Improper Locking
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-2026-31420

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-2026-31420, 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-667: Improper Locking, where the product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors. 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: bridge: mrp: reject zero test interval to avoid OOM panic br_mrp_start_test() and br_mrp_start_in_test() accept the user-supplied interval value from netlink without validation. When interval is 0, usecs_to_jiffies(0) yields 0, causing the delayed work (br_mrp_test_work_expired / br_mrp_in_test_work_expired) to reschedule itself with zero delay. This creates a tight loop on system_percpu_wq that allocates and transmits MRP test frames at maximum rate, exhausting all system memory and causing a kernel panic via OOM deadlock. The same zero-interval issue applies to br_mrp_start_in_test_parse() for interconnect test frames. Use NLA_POLICY_MIN(NLA_U32, 1) in the nla_policy tables for both IFLA_BRIDGE_MRP_START_TEST_INTERVAL and IFLA_BRIDGE_MRP_START_IN_TEST_INTERVAL, so zero is rejected at the netlink attribute parsing layer before the value ever reaches the workqueue scheduling code. This is consistent with how other bridge subsystems (br_fdb, br_mst) enforce range constraints on netlink attributes.

References

NVD — CVE-2026-31420 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31420
git.kernel.org/stable/c/1ec86b4b9e... WEB
https://git.kernel.org/stable/c/1ec86b4b9e28170a2565cf36f0e6e2b96b55134d
git.kernel.org/stable/c/2120bd8546... WEB
https://git.kernel.org/stable/c/2120bd8546cd6a63c558d135773aa8f41c8259fc
git.kernel.org/stable/c/610073ffb7... WEB
https://git.kernel.org/stable/c/610073ffb77ffd2b5eca182d2ac264de4834a175
git.kernel.org/stable/c/630a15a31c... WEB
https://git.kernel.org/stable/c/630a15a31c2034b5b697f4aabc769b9d80d82446
git.kernel.org/stable/c/c9bc352f71... WEB
https://git.kernel.org/stable/c/c9bc352f716d1bebfe43354bce539ec2d0223b30
git.kernel.org/stable/c/e8ec80430b... WEB
https://git.kernel.org/stable/c/e8ec80430bfa520e7352155d6ac632e527cba7aa
git.kernel.org/stable/c/ec8850be9b... WEB
https://git.kernel.org/stable/c/ec8850be9b2b3beac1c7967d95f169dd2785979d
git.kernel.org/stable/c/fa6e249633... WEB
https://git.kernel.org/stable/c/fa6e24963342de4370e3a3c9af41e38277b74cf3

Frequently Asked Questions

What is CVE-2026-31420?
CVE-2026-31420 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-667: Improper Locking.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-31420?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-31420?
CVE-2026-31420 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-2026-31420?
CVE-2026-31420 is classified under CWE-667: Improper Locking (The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.).
How can I check Maven dependencies for CVE-2026-31420?
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-644j-vc34-vf98",
  "modified" : "2026-09-14T12:31:28Z",
  "published" : "2026-04-13T15:31:42Z",
  "aliases" : [ "CVE-2026-31420" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nbridge: mrp: reject zero test interval to avoid OOM panic\n\nbr_mrp_start_test() and br_mrp_start_in_test() accept the user-supplied\ninterval value from netlink without validation. When interval is 0,\nusecs_to_jiffies(0) yields 0, causing the delayed work\n(br_mrp_test_work_expired / br_mrp_in_test_work_expired) to reschedule\nitself with zero delay. This creates a tight loop on system_percpu_wq\nthat allocates and transmits MRP test frames at maximum rate, exhausting\nall system memory and causing a kernel panic via OOM deadlock.\n\nThe same zero-interval issue applies to br_mrp_start_in_test_parse()\nfor interconnect test frames.\n\nUse NLA_POLICY_MIN(NLA_U32, 1) in the nla_policy tables for both\nIFLA_BRIDGE_MRP_START_TEST_INTERVAL and\nIFLA_BRIDGE_MRP_START_IN_TEST_INTERVAL, so zero is rejected at the\nnetlink attribute parsing layer before the value ever reaches the\nworkqueue scheduling code. This is consistent with how other bridge\nsubsystems (br_fdb, br_mst) enforce range constraints on netlink\nattributes.",
  "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" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
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    "url" : "https://git.kernel.org/stable/c/1ec86b4b9e28170a2565cf36f0e6e2b96b55134d"
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  }, {
    "type" : "WEB",
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  }, {
    "type" : "WEB",
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    "url" : "https://git.kernel.org/stable/c/e8ec80430bfa520e7352155d6ac632e527cba7aa"
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    "url" : "https://git.kernel.org/stable/c/ec8850be9b2b3beac1c7967d95f169dd2785979d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fa6e24963342de4370e3a3c9af41e38277b74cf3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-667" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-04-13T14:16:11Z"
  }
}