CVE-2026-68296: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-2mgg-c98j-9pmm
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Advisory Summary

CVE-2026-68296 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-2026-68296 at a Glance

CVE Identifier CVE-2026-68296
GHSA Identifier GHSA-2mgg-c98j-9pmm
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-2026-68296

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-2026-68296, 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: gre: fix lltx regression for GRE tunnels with SEQ/CSUM Before commit 00d066a4d4ed ("netdev_features: convert NETIF_F_LLTX to dev->lltx"), NETIF_F_LLTX was set unconditionally in both __gre_tunnel_init() and ip6gre_tnl_init_features() alongside GRE_FEATURES: dev->features |= GRE_FEATURES | NETIF_F_LLTX; When that commit converted NETIF_F_LLTX to the dev->lltx flag, it placed 'dev->lltx = true' after the SEQ/CSUM early returns instead of before them. This causes GRE/GRETAP/ip6gre tunnels with SEQ or CSUM+encap to lose lockless TX, reintroducing _xmit_lock acquisition around their ndo_start_xmit. Since GRE xmit re-enters the stack via ip_tunnel_xmit(), holding _xmit_lock risks ABBA deadlock with the underlay device. CPU0 CPU1 ---- ---- lock(&qdisc_xmit_lock_key#6); lock(&qdisc_xmit_lock_key#3); lock(&qdisc_xmit_lock_key#6); lock(&qdisc_xmit_lock_key#3); Fix by moving dev->lltx = true before the early returns in both functions, restoring the original unconditional behavior.

References

NVD — CVE-2026-68296 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-68296
git.kernel.org/stable/c/15a1c5f2ed... WEB
https://git.kernel.org/stable/c/15a1c5f2ed2eeb3daad8d5766fd506aeda4710f3
git.kernel.org/stable/c/2bffe37902... WEB
https://git.kernel.org/stable/c/2bffe379023512d280337c70faeb6a8cc435db5e
git.kernel.org/stable/c/675ed582c1... WEB
https://git.kernel.org/stable/c/675ed582c1aa4d919dd535490de08c015005c653
git.kernel.org/stable/c/9f948e9aed... WEB
https://git.kernel.org/stable/c/9f948e9aede9678f4103457daf2bc9dd54c65a06

Frequently Asked Questions

What is CVE-2026-68296?
CVE-2026-68296 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-2026-68296?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-68296?
CVE-2026-68296 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-68296?
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-2mgg-c98j-9pmm",
  "modified" : "2026-08-10T15:33:45Z",
  "published" : "2026-08-10T15:33:45Z",
  "aliases" : [ "CVE-2026-68296" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gre: fix lltx regression for GRE tunnels with SEQ/CSUM\n\nBefore commit 00d066a4d4ed (\"netdev_features: convert NETIF_F_LLTX to\ndev->lltx\"), NETIF_F_LLTX was set unconditionally in both\n__gre_tunnel_init() and ip6gre_tnl_init_features() alongside\nGRE_FEATURES:\n\n    dev->features |= GRE_FEATURES | NETIF_F_LLTX;\n\nWhen that commit converted NETIF_F_LLTX to the dev->lltx flag, it\nplaced 'dev->lltx = true' after the SEQ/CSUM early returns instead\nof before them. This causes GRE/GRETAP/ip6gre tunnels with SEQ or\nCSUM+encap to lose lockless TX, reintroducing _xmit_lock acquisition\naround their ndo_start_xmit. Since GRE xmit re-enters the stack via\nip_tunnel_xmit(), holding _xmit_lock risks ABBA deadlock with the\nunderlay device.\n\n  CPU0                        CPU1\n  ----                        ----\n  lock(&qdisc_xmit_lock_key#6);\n                              lock(&qdisc_xmit_lock_key#3);\n                              lock(&qdisc_xmit_lock_key#6);\n  lock(&qdisc_xmit_lock_key#3);\n\nFix by moving dev->lltx = true before the early returns in both\nfunctions, restoring the original unconditional behavior.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-68296"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/15a1c5f2ed2eeb3daad8d5766fd506aeda4710f3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2bffe379023512d280337c70faeb6a8cc435db5e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/675ed582c1aa4d919dd535490de08c015005c653"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9f948e9aede9678f4103457daf2bc9dd54c65a06"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-10T13:20:19Z"
  }
}