CVE-2026-97959: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-q5gc-9c5f-rc6r
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Advisory Summary

CVE-2026-97959 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-2026-97959 at a Glance

CVE Identifier CVE-2026-97959
GHSA Identifier GHSA-q5gc-9c5f-rc6r
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-2026-97959

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-2026-97959, 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/sched: cls_route: free emptied bucket on filter move route4_change can move an existing filter to a different top-level bucket: route4_set_parms recomputes the handle from TCA_ROUTE4_TO/ FROM/IIF, and the handle-mismatch check is gated on the 'new' flag, so for an existing filter the new handle may differ from the old one and land in a different bucket. When this happens, the filter is unlinked from the old bucket, but the bucket itself is never freed once it goes empty. The stale empty bucket remains in head->table[], causing route4_delete to report *last=false even after the last live filter is gone. That pins the empty tcf_proto and causes a leak. Fix this by refcounting the filters linked to a bucket and freeing the bucket when the count drops to zero. The existing scan in route4_delete goes away with it. The count is updated at all sites that link or unlink a filter during add, change and delete, and the bucket is dropped from head->table[] as soon as it reaches zero. Conditions to recreate the bug: CONFIG_NET_CLS_ROUTE4=y, CONFIG_NET_SCH_INGRESS=y, CONFIG_NET_CLS_ACT=y. tc qdisc replace dev lo clsact tc filter add dev lo ingress protocol ip pref 100 route from 1 to 1 tc filter change dev lo ingress protocol ip pref 100 handle 0x10001 \ route from 1 to 2 tc filter del dev lo ingress protocol ip pref 100 handle 0x10002 \ route from 1 to 2 tc filter show dev lo ingress | grep -c 'pref 100 route chain 0 '

References

NVD — CVE-2026-97959 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-97959
git.kernel.org/stable/c/1853f30cf5... WEB
https://git.kernel.org/stable/c/1853f30cf5c84971f99788a76207c6f745380896
git.kernel.org/stable/c/2e2f130951... WEB
https://git.kernel.org/stable/c/2e2f130951d34871b0643bf700164d97cff4b427
git.kernel.org/stable/c/41e9407920... WEB
https://git.kernel.org/stable/c/41e94079200aaf0cdbe4594b0af75710b33da124
git.kernel.org/stable/c/48d38bf8c2... WEB
https://git.kernel.org/stable/c/48d38bf8c22a05fde07ba1f885cde27b851649a2
git.kernel.org/stable/c/81dd117c04... WEB
https://git.kernel.org/stable/c/81dd117c04422c6d0c7974aba9fa6a0ba370959b
git.kernel.org/stable/c/9e7741b41a... WEB
https://git.kernel.org/stable/c/9e7741b41a25b9d49df4d262fa314342e6f95c50
git.kernel.org/stable/c/cc99d26b12... WEB
https://git.kernel.org/stable/c/cc99d26b12431e4e4d0e346ec32764eb42c0aed9
git.kernel.org/stable/c/f8495d6743... WEB
https://git.kernel.org/stable/c/f8495d67434e1cb7e511297687ca55fdb28e4c20

Frequently Asked Questions

What is CVE-2026-97959?
CVE-2026-97959 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-2026-97959?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-97959?
CVE-2026-97959 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-97959?
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-q5gc-9c5f-rc6r",
  "modified" : "2026-10-03T12:31:22Z",
  "published" : "2026-09-25T12:31:30Z",
  "aliases" : [ "CVE-2026-97959" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: cls_route: free emptied bucket on filter move\n\nroute4_change can move an existing filter to a different top-level\nbucket: route4_set_parms recomputes the handle from TCA_ROUTE4_TO/\nFROM/IIF, and the handle-mismatch check is gated on the 'new' flag, so\nfor an existing filter the new handle may differ from the old one and\nland in a different bucket. When this happens, the filter is unlinked\nfrom the old bucket, but the bucket itself is never freed once it goes\nempty. The stale empty bucket remains in head->table[], causing\nroute4_delete to report *last=false even after the last live filter is\ngone. That pins the empty tcf_proto and causes a leak.\n\nFix this by refcounting the filters linked to a bucket and freeing the\nbucket when the count drops to zero. The existing scan in route4_delete\ngoes away with it.\n\nThe count is updated at all sites that link or unlink a filter during add,\nchange and delete, and the bucket is dropped from head->table[] as soon as\nit reaches zero.\n\nConditions to recreate the bug:\n  CONFIG_NET_CLS_ROUTE4=y, CONFIG_NET_SCH_INGRESS=y, CONFIG_NET_CLS_ACT=y.\n\n  tc qdisc replace dev lo clsact\n  tc filter add dev lo ingress protocol ip pref 100 route from 1 to 1\n  tc filter change dev lo ingress protocol ip pref 100 handle 0x10001 \\\n    route from 1 to 2\n  tc filter del dev lo ingress protocol ip pref 100 handle 0x10002 \\\n    route from 1 to 2\n  tc filter show dev lo ingress | grep -c 'pref 100 route chain 0 '",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-97959"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1853f30cf5c84971f99788a76207c6f745380896"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2e2f130951d34871b0643bf700164d97cff4b427"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/41e94079200aaf0cdbe4594b0af75710b33da124"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/48d38bf8c22a05fde07ba1f885cde27b851649a2"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/81dd117c04422c6d0c7974aba9fa6a0ba370959b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9e7741b41a25b9d49df4d262fa314342e6f95c50"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cc99d26b12431e4e4d0e346ec32764eb42c0aed9"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f8495d67434e1cb7e511297687ca55fdb28e4c20"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-25T11:17:23Z"
  }
}