CVE-2026-93795: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-q3xm-frv6-mwqx
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Advisory Summary

CVE-2026-93795 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-2026-93795 at a Glance

CVE Identifier CVE-2026-93795
GHSA Identifier GHSA-q3xm-frv6-mwqx
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-2026-93795

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-2026-93795, 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: blk-cgroup: fix leaks and online flag on radix_tree_insert failure When radix_tree_insert() fails in blkg_create(), the error path has two issues: 1. blkg->online is set to true unconditionally, even when the blkg was never fully inserted. Move the assignment inside the success block. 2. The error path calls blkg_put() without first calling percpu_ref_kill(). Because the refcount is still in percpu mode, percpu_ref_put() only does this_cpu_sub() without checking for zero, so blkg_release() is never triggered. This permanently leaks the blkg memory, its percpu iostat, policy data, the parent blkg reference, and the cgroup css reference — the latter preventing the cgroup from ever being destroyed. Fix by replacing blkg_put() with percpu_ref_kill(), matching the pattern used in blkg_destroy().

References

NVD — CVE-2026-93795 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93795
git.kernel.org/stable/c/0f840db042... WEB
https://git.kernel.org/stable/c/0f840db042caee9d2f3dcdcf97d6674f6e4c1e30
git.kernel.org/stable/c/4c0d150fb9... WEB
https://git.kernel.org/stable/c/4c0d150fb98ea40760611979f4e664c244b20966
git.kernel.org/stable/c/6e85f02d45... WEB
https://git.kernel.org/stable/c/6e85f02d45b5977c0326a8d854c6db878aa6b34a
git.kernel.org/stable/c/ada8270ccd... WEB
https://git.kernel.org/stable/c/ada8270ccdb6f212da5eb22614c28ea418746a4a
git.kernel.org/stable/c/c3650be82e... WEB
https://git.kernel.org/stable/c/c3650be82ef6e7af13b79b2d10a7363bdf54aa7f
git.kernel.org/stable/c/dbbca20764... WEB
https://git.kernel.org/stable/c/dbbca20764382b4d411ec2918f4e278ffe547acc
git.kernel.org/stable/c/f53945d7c7... WEB
https://git.kernel.org/stable/c/f53945d7c712efe63fadbcc5ffed6370871fd0d3

Frequently Asked Questions

What is CVE-2026-93795?
CVE-2026-93795 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-2026-93795?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-93795?
CVE-2026-93795 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-93795?
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-q3xm-frv6-mwqx",
  "modified" : "2026-10-03T12:31:09Z",
  "published" : "2026-09-24T18:31:29Z",
  "aliases" : [ "CVE-2026-93795" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: fix leaks and online flag on radix_tree_insert failure\n\nWhen radix_tree_insert() fails in blkg_create(), the error path has two\nissues:\n\n1. blkg->online is set to true unconditionally, even when the blkg was\n   never fully inserted.  Move the assignment inside the success block.\n\n2. The error path calls blkg_put() without first calling\n   percpu_ref_kill().  Because the refcount is still in percpu mode,\n   percpu_ref_put() only does this_cpu_sub() without checking for zero,\n   so blkg_release() is never triggered.  This permanently leaks the\n   blkg memory, its percpu iostat, policy data, the parent blkg\n   reference, and the cgroup css reference — the latter preventing the\n   cgroup from ever being destroyed.\n\nFix by replacing blkg_put() with percpu_ref_kill(), matching the pattern\nused in blkg_destroy().",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-93795"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0f840db042caee9d2f3dcdcf97d6674f6e4c1e30"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4c0d150fb98ea40760611979f4e664c244b20966"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6e85f02d45b5977c0326a8d854c6db878aa6b34a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ada8270ccdb6f212da5eb22614c28ea418746a4a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c3650be82ef6e7af13b79b2d10a7363bdf54aa7f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dbbca20764382b4d411ec2918f4e278ffe547acc"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f53945d7c712efe63fadbcc5ffed6370871fd0d3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-24T17:17:12Z"
  }
}