CVE-2026-74480: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-98rv-7h6m-5q72
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CVSS 9.8
Published
Advisory Summary

CVE-2026-74480 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-74480 at a Glance

CVE Identifier CVE-2026-74480
GHSA Identifier GHSA-98rv-7h6m-5q72
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-74480

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-2026-74480, 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: stop fast-leave after deleting a port group br_multicast_leave_group() iterates mp->ports with pp = &p->next in its fast-leave path. After br_multicast_del_pg() removes p, continuing the loop advances pp through the deleted entry. If multicast-to-unicast was enabled, the bridge can hold multiple port groups for the same port and group with different source MAC addresses. Once multicast-to-unicast is disabled, br_port_group_equal() matches those entries by port only. A fast leave can then delete one entry and continue from its stale next pointer, leaving mp->ports pointing at a deleted port group. Fast leave only needs to remove one matching port group. Break after br_multicast_del_pg() so the loop stops before dereferencing the removed entry.

References

NVD — CVE-2026-74480 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74480
git.kernel.org/stable/c/0309ebbc57... WEB
https://git.kernel.org/stable/c/0309ebbc570000ea0df11c06b69798e5860c5f6f
git.kernel.org/stable/c/159ad90cb9... WEB
https://git.kernel.org/stable/c/159ad90cb929c033308bb39a2c5f8fbf393b77aa
git.kernel.org/stable/c/1a109cc989... WEB
https://git.kernel.org/stable/c/1a109cc9890d017c41d77e6c82da739579c49f0b
git.kernel.org/stable/c/4695430e81... WEB
https://git.kernel.org/stable/c/4695430e8132420bf8de94da3eb36a6cf35fde6b
git.kernel.org/stable/c/482bcb8513... WEB
https://git.kernel.org/stable/c/482bcb85139addb4e8ac8ed10baeda3e0aad4031
git.kernel.org/stable/c/4c57056ca6... WEB
https://git.kernel.org/stable/c/4c57056ca6aace2e9f94ae9298bf49ef6b0c95e4
git.kernel.org/stable/c/a39789f211... WEB
https://git.kernel.org/stable/c/a39789f211b8a4125f0c70e05b30cf715f4f187d
git.kernel.org/stable/c/d6c32e2e25... WEB
https://git.kernel.org/stable/c/d6c32e2e25a9a06ba021030e26b6d602a277eb72

Frequently Asked Questions

What is CVE-2026-74480?
CVE-2026-74480 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-2026-74480?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-74480?
CVE-2026-74480 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-74480?
CVE-2026-74480 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-74480?
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 
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  "id" : "GHSA-98rv-7h6m-5q72",
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  "published" : "2026-08-15T15:30:34Z",
  "aliases" : [ "CVE-2026-74480" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: stop fast-leave after deleting a port group\n\nbr_multicast_leave_group() iterates mp->ports with pp = &p->next in\nits fast-leave path. After br_multicast_del_pg() removes p,\ncontinuing the loop advances pp through the deleted entry.\n\nIf multicast-to-unicast was enabled, the bridge can hold multiple port\ngroups for the same port and group with different source MAC\naddresses. Once multicast-to-unicast is disabled,\nbr_port_group_equal() matches those entries by port only. A fast leave\ncan then delete one entry and continue from its stale next pointer,\nleaving mp->ports pointing at a deleted port group.\n\nFast leave only needs to remove one matching port group. Break after\nbr_multicast_del_pg() so the loop stops before dereferencing the\nremoved entry.",
  "severity" : [ {
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    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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  "database_specific" : {
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}