CVE-2026-98026: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-r366-wr25-m9fj
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Advisory Summary

CVE-2026-98026 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-2026-98026 at a Glance

CVE Identifier CVE-2026-98026
GHSA Identifier GHSA-r366-wr25-m9fj
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-2026-98026

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-2026-98026, 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: bridge: mcast: properly convert mglist to rcu Sashiko reported a bug [1] that br_multicast_del_port_group unlists the port group not using proper rcu helper that preserves the next pointer and after that immediately frees the port group without waiting for rcu grace period. The only rcu walker of mglist is br_multicast_list_adjacent() and it turns out that function has always been buggy because mglist was never properly converted to RCU. Fix it by converting it to rcu and moving its initialization after eth_addr's. Initializing p->next can use RCU_INIT_POINTER because we have a barrier from the hlist_add_head_rcu call later, besides we're initializing an unpublished structure anyway. [1] https://netdev-ai.bots.linux.dev/sashiko/#/patchset/20260826014200.362304-1-littleddfu%40gmail.com

References

NVD — CVE-2026-98026 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98026
git.kernel.org/stable/c/37cb9a8160... WEB
https://git.kernel.org/stable/c/37cb9a81600da8250f24e25edc07253b62353cbe
git.kernel.org/stable/c/38ab2a4350... WEB
https://git.kernel.org/stable/c/38ab2a435001a3c4dbeb70a52f5921e1ccd66f55
git.kernel.org/stable/c/4b772869a1... WEB
https://git.kernel.org/stable/c/4b772869a1e5f9da5cef5b9c722ec0aa424ee0a0
git.kernel.org/stable/c/98247c8264... WEB
https://git.kernel.org/stable/c/98247c8264d2076f81fa114bdfa2c2271953ac7c
git.kernel.org/stable/c/f7bf57e94a... WEB
https://git.kernel.org/stable/c/f7bf57e94a5d6214b87be08486cb33836fbfa573

Frequently Asked Questions

What is CVE-2026-98026?
CVE-2026-98026 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-2026-98026?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98026?
CVE-2026-98026 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98026?
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-r366-wr25-m9fj",
  "modified" : "2026-10-03T12:31:24Z",
  "published" : "2026-09-25T12:31:33Z",
  "aliases" : [ "CVE-2026-98026" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: mcast: properly convert mglist to rcu\n\nSashiko reported a bug [1] that br_multicast_del_port_group unlists the\nport group not using proper rcu helper that preserves the next pointer and\nafter that immediately frees the port group without waiting for rcu grace\nperiod. The only rcu walker of mglist is br_multicast_list_adjacent() and\nit turns out that function has always been buggy because mglist was never\nproperly converted to RCU. Fix it by converting it to rcu and moving its\ninitialization after eth_addr's. Initializing p->next can use\nRCU_INIT_POINTER because we have a barrier from the hlist_add_head_rcu call\nlater, besides we're initializing an unpublished structure anyway.\n\n[1] https://netdev-ai.bots.linux.dev/sashiko/#/patchset/20260826014200.362304-1-littleddfu%40gmail.com",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98026"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/37cb9a81600da8250f24e25edc07253b62353cbe"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/38ab2a435001a3c4dbeb70a52f5921e1ccd66f55"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4b772869a1e5f9da5cef5b9c722ec0aa424ee0a0"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/98247c8264d2076f81fa114bdfa2c2271953ac7c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f7bf57e94a5d6214b87be08486cb33836fbfa573"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-25T11:17:31Z"
  }
}