CVE-2026-74496: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-p6w2-3hc3-fx3j
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CVSS 7.8
Published
Advisory Summary

CVE-2026-74496 is a HIGH (CVSS 7.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-74496 at a Glance

CVE Identifier CVE-2026-74496
GHSA Identifier GHSA-p6w2-3hc3-fx3j
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2026-74496

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-2026-74496, 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: fou: Fix use-after-free in fou_create() fou_create() publishes struct fou through sk_user_data before adding the new FOU port to the per-netns list. If fou_add_to_port_list() fails, the error path frees fou while it is still reachable through sk_user_data. A concurrent receive can then dereference the freed object in fou_from_sock(). This ordering issue was previously noted in the linked discussion. The failure is reachable when local port 0 is requested. Each socket binds to a different ephemeral port, but fou_cfg_cmp() compares the requested port 0 and reports -EALREADY once an entry already exists. Release the tunnel socket before freeing fou so sk_user_data is cleared first, and defer reclamation with kfree_rcu() to protect concurrent RCU readers. This matches the lifetime handling in fou_release().

References

NVD — CVE-2026-74496 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74496
git.kernel.org/stable/c/0ee628a58d... WEB
https://git.kernel.org/stable/c/0ee628a58d83e571f36ec9f07624d6845e420c50
git.kernel.org/stable/c/58835985c0... WEB
https://git.kernel.org/stable/c/58835985c035a8333742f829ad7e0889a082f9d3
git.kernel.org/stable/c/9042867d47... WEB
https://git.kernel.org/stable/c/9042867d4701728f0c6527215b11471759904d8f
git.kernel.org/stable/c/99f4d3120b... WEB
https://git.kernel.org/stable/c/99f4d3120b244f92e5df787152041296a2860cb5
git.kernel.org/stable/c/a28d8903bf... WEB
https://git.kernel.org/stable/c/a28d8903bfe76089ea4bbdbff9976965f9ef8107
git.kernel.org/stable/c/a6fca682cf... WEB
https://git.kernel.org/stable/c/a6fca682cfa2041e31aa72cc397c4a1406eb7468
git.kernel.org/stable/c/b14361aca6... WEB
https://git.kernel.org/stable/c/b14361aca6350ff7907b0e9903c7b94dc7d5d4a0
git.kernel.org/stable/c/b3f9c3e60a... WEB
https://git.kernel.org/stable/c/b3f9c3e60aa25453774f899d25b5e61dd0bec1d5

Frequently Asked Questions

What is CVE-2026-74496?
CVE-2026-74496 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-2026-74496?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-74496?
CVE-2026-74496 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-74496?
CVE-2026-74496 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-74496?
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-p6w2-3hc3-fx3j",
  "modified" : "2026-10-03T12:31:04Z",
  "published" : "2026-08-15T15:30:34Z",
  "aliases" : [ "CVE-2026-74496" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nfou: Fix use-after-free in fou_create()\n\nfou_create() publishes struct fou through sk_user_data before adding the\nnew FOU port to the per-netns list.  If fou_add_to_port_list() fails,\nthe error path frees fou while it is still reachable through\nsk_user_data.  A concurrent receive can then dereference the freed\nobject in fou_from_sock().\n\nThis ordering issue was previously noted in the linked discussion.\n\nThe failure is reachable when local port 0 is requested.  Each socket\nbinds to a different ephemeral port, but fou_cfg_cmp() compares the\nrequested port 0 and reports -EALREADY once an entry already exists.\n\nRelease the tunnel socket before freeing fou so sk_user_data is cleared\nfirst, and defer reclamation with kfree_rcu() to protect concurrent RCU\nreaders.  This matches the lifetime handling in fou_release().",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
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    "type" : "WEB",
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  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T13:17:54Z"
  }
}