CVE-2026-68137: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-8pjr-r8qw-rq6v
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CVSS 9.8
Published
Advisory Summary

CVE-2026-68137 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-2026-68137 at a Glance

CVE Identifier CVE-2026-68137
GHSA Identifier GHSA-8pjr-r8qw-rq6v
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-2026-68137

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-2026-68137, 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/x25: fix use-after-free in x25_kill_by_neigh() x25_kill_by_neigh() walks the global X.25 socket list looking for sockets attached to a terminating neighbour. x25_list_lock protects list membership while the lookup is in progress, but it does not pin a socket's lifetime after the lock is dropped. The function currently drops x25_list_lock before calling lock_sock(s). A concurrent close can run x25_release(), remove the same socket from x25_list, and drop the last socket reference in that window. The neighbour teardown path can then lock or inspect a freed struct sock/struct x25_sock. Take sock_hold(s) while x25_list_lock still proves that the list entry is live, then drop the temporary reference after the socket has been locked, rechecked, and released. Recheck x25_sk(s)->neighbour after lock_sock(), because another path may have disconnected the socket before this path acquired the socket lock. Restart the list walk after each disconnect because the list lock was dropped and the previous iterator state may no longer be valid. A QEMU/KASAN run against origin/master reproduced a slab-use-after-free in x25_kill_by_neigh().

References

NVD — CVE-2026-68137 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-68137
git.kernel.org/stable/c/3f4fe26c20... WEB
https://git.kernel.org/stable/c/3f4fe26c20c30bd5a2e2583e80685def0b27858c
git.kernel.org/stable/c/5499e0602d... WEB
https://git.kernel.org/stable/c/5499e0602d2faafd42c580d25f615903c3fbe11b
git.kernel.org/stable/c/5e8a754ac2... WEB
https://git.kernel.org/stable/c/5e8a754ac2009a88a7b99ab61eab6296eed360f3
git.kernel.org/stable/c/610678d4be... WEB
https://git.kernel.org/stable/c/610678d4be94b619c751572e8a58de705592cd07
git.kernel.org/stable/c/9aabda5531... WEB
https://git.kernel.org/stable/c/9aabda553184346f74810e2ee1d96920b4612e3f
git.kernel.org/stable/c/c98a454d1a... WEB
https://git.kernel.org/stable/c/c98a454d1a9e1bd09d5fd55a7aa589b199340b88
git.kernel.org/stable/c/db6b04f6d6... WEB
https://git.kernel.org/stable/c/db6b04f6d65549bb1c7bc8e64a92e7b7d03be676
git.kernel.org/stable/c/ec6d91a1bf... WEB
https://git.kernel.org/stable/c/ec6d91a1bf2ebd767d3d43f6d249ee0ed3f4558a

Frequently Asked Questions

What is CVE-2026-68137?
CVE-2026-68137 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-2026-68137?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-68137?
CVE-2026-68137 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-2026-68137?
CVE-2026-68137 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-68137?
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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  "schema_version" : "1.4.0",
  "id" : "GHSA-8pjr-r8qw-rq6v",
  "modified" : "2026-08-19T18:32:06Z",
  "published" : "2026-08-10T15:33:37Z",
  "aliases" : [ "CVE-2026-68137" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/x25: fix use-after-free in x25_kill_by_neigh()\n\nx25_kill_by_neigh() walks the global X.25 socket list looking for sockets\nattached to a terminating neighbour. x25_list_lock protects list membership\nwhile the lookup is in progress, but it does not pin a socket's lifetime\nafter the lock is dropped.\n\nThe function currently drops x25_list_lock before calling lock_sock(s). A\nconcurrent close can run x25_release(), remove the same socket from\nx25_list, and drop the last socket reference in that window. The neighbour\nteardown path can then lock or inspect a freed struct sock/struct x25_sock.\n\nTake sock_hold(s) while x25_list_lock still proves that the list entry is\nlive, then drop the temporary reference after the socket has been locked,\nrechecked, and released. Recheck x25_sk(s)->neighbour after lock_sock(),\nbecause another path may have disconnected the socket before this path\nacquired the socket lock. Restart the list walk after each disconnect\nbecause the list lock was dropped and the previous iterator state may no\nlonger be valid.\n\nA QEMU/KASAN run against origin/master reproduced a slab-use-after-free in\nx25_kill_by_neigh().",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-68137"
  }, {
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    "url" : "https://git.kernel.org/stable/c/3f4fe26c20c30bd5a2e2583e80685def0b27858c"
  }, {
    "type" : "WEB",
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5e8a754ac2009a88a7b99ab61eab6296eed360f3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/610678d4be94b619c751572e8a58de705592cd07"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9aabda553184346f74810e2ee1d96920b4612e3f"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c98a454d1a9e1bd09d5fd55a7aa589b199340b88"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/db6b04f6d65549bb1c7bc8e64a92e7b7d03be676"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ec6d91a1bf2ebd767d3d43f6d249ee0ed3f4558a"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-10T13:19:59Z"
  }
}