CVE-2026-64137: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-5vrr-7h3c-f6hv
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CVSS 7.8
Published
Advisory Summary

CVE-2026-64137 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-2026-64137 at a Glance

CVE Identifier CVE-2026-64137
GHSA Identifier GHSA-5vrr-7h3c-f6hv
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-2026-64137

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-2026-64137, 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: smb: client: require net admin for CIFS SWN netlink CIFS_GENL_CMD_SWN_NOTIFY is the userspace witness-notify command. The intended sender is the cifs.witness helper, but the generic-netlink operation currently has no capability flag, so any local process can send RESOURCE_CHANGE or CLIENT_MOVE notifications to the in-kernel witness handler. The same family exposes CIFS_GENL_MCGRP_SWN without multicast-group capability flags. Register messages sent to that group include the witness registration id and, for NTLM-authenticated mounts, the username, domain, and password attributes copied from the CIFS session. An unprivileged local process should not be able to join that group and receive those messages. Require CAP_NET_ADMIN for incoming SWN_NOTIFY commands with GENL_ADMIN_PERM, and require CAP_NET_ADMIN over the network namespace for joining the SWN multicast group with GENL_MCAST_CAP_NET_ADMIN. The cifs.witness service runs with the privileges needed for both operations.

References

NVD — CVE-2026-64137 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64137
git.kernel.org/stable/c/969bc63703... WEB
https://git.kernel.org/stable/c/969bc6370334a5b4720c5470783295d6484bbc95
git.kernel.org/stable/c/9919021a3b... WEB
https://git.kernel.org/stable/c/9919021a3b7974ae66a5f9915e3a48c10cfd409b
git.kernel.org/stable/c/9cf7eb8919... WEB
https://git.kernel.org/stable/c/9cf7eb8919344932f909b2fac76296f7656fda8d
git.kernel.org/stable/c/a3238b09c5... WEB
https://git.kernel.org/stable/c/a3238b09c58f323e40743ce174cd0ab81b5c09ed
git.kernel.org/stable/c/a8d17d22db... WEB
https://git.kernel.org/stable/c/a8d17d22db591099519a89f14dd24810daba74c3
git.kernel.org/stable/c/c2397b93fb... WEB
https://git.kernel.org/stable/c/c2397b93fbb6f44a788fff30f99be2c20cc5e50f
git.kernel.org/stable/c/d1ebfce2c1... WEB
https://git.kernel.org/stable/c/d1ebfce2c1d161186a82e77590bf7da2ea1bce91

Frequently Asked Questions

What is CVE-2026-64137?
CVE-2026-64137 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-2026-64137?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64137?
CVE-2026-64137 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-2026-64137?
CVE-2026-64137 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-64137?
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-5vrr-7h3c-f6hv",
  "modified" : "2026-07-20T15:32:01Z",
  "published" : "2026-07-19T18:31:53Z",
  "aliases" : [ "CVE-2026-64137" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: require net admin for CIFS SWN netlink\n\nCIFS_GENL_CMD_SWN_NOTIFY is the userspace witness-notify command.  The\nintended sender is the cifs.witness helper, but the generic-netlink\noperation currently has no capability flag, so any local process can send\nRESOURCE_CHANGE or CLIENT_MOVE notifications to the in-kernel witness\nhandler.\n\nThe same family exposes CIFS_GENL_MCGRP_SWN without multicast-group\ncapability flags.  Register messages sent to that group include the witness\nregistration id and, for NTLM-authenticated mounts, the username, domain,\nand password attributes copied from the CIFS session.  An unprivileged\nlocal process should not be able to join that group and receive those\nmessages.\n\nRequire CAP_NET_ADMIN for incoming SWN_NOTIFY commands with\nGENL_ADMIN_PERM, and require CAP_NET_ADMIN over the network namespace for\njoining the SWN multicast group with GENL_MCAST_CAP_NET_ADMIN.  The\ncifs.witness service runs with the privileges needed for both operations.",
  "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" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64137"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/969bc6370334a5b4720c5470783295d6484bbc95"
  }, {
    "type" : "WEB",
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    "type" : "WEB",
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d1ebfce2c1d161186a82e77590bf7da2ea1bce91"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T16:17:55Z"
  }
}