CVE-2026-98101: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-wv36-qwc6-r8c9
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Advisory Summary

CVE-2026-98101 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-2026-98101 at a Glance

CVE Identifier CVE-2026-98101
GHSA Identifier GHSA-wv36-qwc6-r8c9
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-2026-98101

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-2026-98101, 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: ipv6: mcast: use copy-on-write RCU updates in ip6_mc_source() pmc->sflist is read locklessly under rcu_read_lock() by inet6_mc_check() during packet reception in the UDP and RAW multicast receive paths. ip6_mc_source() mutated psl->sl_addr and psl->sl_count in-place when adding or removing a source filter. Additionally, when expanding the filter buffer, newpsl was published via rcu_assign_pointer() before writing the new source into the array. Because 16-byte struct in6_addr writes are not atomic and array shifting is not synchronized with RCU readers, concurrent readers in inet6_mc_check() could read torn IPv6 addresses or observe duplicated/missed source entries. Fix this by switching ip6_mc_source() to copy-on-write RCU updates: allocate and fully populate newpsl before publishing it via rcu_assign_pointer(), and reclaim the old filter via kfree_rcu(), matching ip6_mc_msfilter(). Also remove the now unused IP6_SFBLOCK macro.

References

NVD — CVE-2026-98101 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98101
git.kernel.org/stable/c/20db91a052... WEB
https://git.kernel.org/stable/c/20db91a052332ef5552bd2f651ffb9db911cf67b
git.kernel.org/stable/c/2c2091e2ee... WEB
https://git.kernel.org/stable/c/2c2091e2ee93049fc513ad1e6c99d8b6c809f467
git.kernel.org/stable/c/ac51321d3b... WEB
https://git.kernel.org/stable/c/ac51321d3b2391860a935820ebcf4d8b9bb16a8a
git.kernel.org/stable/c/c073d1b070... WEB
https://git.kernel.org/stable/c/c073d1b070f171d206b19c98d71739a97f15b3f1
git.kernel.org/stable/c/dba00514bf... WEB
https://git.kernel.org/stable/c/dba00514bf668c26cb4900e9f0da84bf96bf065a

Frequently Asked Questions

What is CVE-2026-98101?
CVE-2026-98101 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-2026-98101?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98101?
CVE-2026-98101 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98101?
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-wv36-qwc6-r8c9",
  "modified" : "2026-10-03T12:31:27Z",
  "published" : "2026-09-25T12:31:36Z",
  "aliases" : [ "CVE-2026-98101" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: use copy-on-write RCU updates in ip6_mc_source()\n\npmc->sflist is read locklessly under rcu_read_lock() by\ninet6_mc_check() during packet reception in the UDP and RAW\nmulticast receive paths.\n\nip6_mc_source() mutated psl->sl_addr and psl->sl_count in-place\nwhen adding or removing a source filter. Additionally, when expanding\nthe filter buffer, newpsl was published via rcu_assign_pointer()\nbefore writing the new source into the array.\n\nBecause 16-byte struct in6_addr writes are not atomic and array\nshifting is not synchronized with RCU readers, concurrent readers in\ninet6_mc_check() could read torn IPv6 addresses or observe\nduplicated/missed source entries.\n\nFix this by switching ip6_mc_source() to copy-on-write RCU updates:\nallocate and fully populate newpsl before publishing it via\nrcu_assign_pointer(), and reclaim the old filter via kfree_rcu(),\nmatching ip6_mc_msfilter().\n\nAlso remove the now unused IP6_SFBLOCK macro.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98101"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/20db91a052332ef5552bd2f651ffb9db911cf67b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2c2091e2ee93049fc513ad1e6c99d8b6c809f467"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ac51321d3b2391860a935820ebcf4d8b9bb16a8a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c073d1b070f171d206b19c98d71739a97f15b3f1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dba00514bf668c26cb4900e9f0da84bf96bf065a"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-25T11:17:39Z"
  }
}