CVE-2026-98490: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-4r7h-j2g8-7vfx
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Advisory Summary

CVE-2026-98490 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-98490 at a Glance

CVE Identifier CVE-2026-98490
GHSA Identifier GHSA-4r7h-j2g8-7vfx
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-98490

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-2026-98490, 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: net: openvswitch: conntrack: fix helper UAF due to extensions realloc While calling the helpers, a raw pointer to the extensions area is wired into expectations list: -> nf_ct_helper() -> helper->help() -> nf_ct_expect_related_report() -> nf_ct_expect_insert() -> hlist_add_head_rcu(&exp->lnode, &master_help->expectations) In case the connection is not confirmed yet, more extensions can be added afterwards with *_ext_add() calls reallocating the extension space and leaving the now invalid pointer in the expectations list that is later accessed while removing the expectation. Make sure that helpers are called at the end after all the other extensions are already added. Note that the helper rejection now leaves the mark and labels set, but that's not different from how the NAT was handled before or how the mark and the labels were handled on confirmation failure. And there are no atomicity guarantees provided by the API anyway.

References

NVD — CVE-2026-98490 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98490
git.kernel.org/stable/c/1a4151e6be... WEB
https://git.kernel.org/stable/c/1a4151e6be57b098b7a5ebfbde58585e83200cdc
git.kernel.org/stable/c/5f23080a62... WEB
https://git.kernel.org/stable/c/5f23080a625dd7855ab91485c8d691a54a1979f0
git.kernel.org/stable/c/afcf362625... WEB
https://git.kernel.org/stable/c/afcf362625190c5260530b1d6c7daa98831f6b83
git.kernel.org/stable/c/e02a83bb0b... WEB
https://git.kernel.org/stable/c/e02a83bb0b7a203f6a22f55ad5f426765560f811

Frequently Asked Questions

What is CVE-2026-98490?
CVE-2026-98490 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-2026-98490?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98490?
CVE-2026-98490 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98490?
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-4r7h-j2g8-7vfx",
  "modified" : "2026-10-18T18:31:51Z",
  "published" : "2026-10-18T18:31:51Z",
  "aliases" : [ "CVE-2026-98490" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: openvswitch: conntrack: fix helper UAF due to extensions realloc\n\nWhile calling the helpers, a raw pointer to the extensions area is\nwired into expectations list:\n\n  -> nf_ct_helper()\n   -> helper->help()\n    -> nf_ct_expect_related_report()\n     -> nf_ct_expect_insert()\n      -> hlist_add_head_rcu(&exp->lnode, &master_help->expectations)\n\nIn case the connection is not confirmed yet, more extensions can be\nadded afterwards with *_ext_add() calls reallocating the extension\nspace and leaving the now invalid pointer in the expectations list\nthat is later accessed while removing the expectation.\n\nMake sure that helpers are called at the end after all the other\nextensions are already added.\n\nNote that the helper rejection now leaves the mark and labels set,\nbut that's not different from how the NAT was handled before or how\nthe mark and the labels were handled on confirmation failure.  And\nthere are no atomicity guarantees provided by the API anyway.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98490"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1a4151e6be57b098b7a5ebfbde58585e83200cdc"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5f23080a625dd7855ab91485c8d691a54a1979f0"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/afcf362625190c5260530b1d6c7daa98831f6b83"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e02a83bb0b7a203f6a22f55ad5f426765560f811"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-18T16:16:59Z"
  }
}