CVE-2026-80906: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-wgjr-c9mx-3f4x
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Advisory Summary

CVE-2026-80906 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-2026-80906 at a Glance

CVE Identifier CVE-2026-80906
GHSA Identifier GHSA-wgjr-c9mx-3f4x
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-2026-80906

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-2026-80906, 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: packet: fix wrong transport_header when sending VLAN-tagged frame In packet_parse_headers(), when processing a VLAN-tagged frame, skb_set_network_header() is called to advance network_header past the VLAN tag to the inner protocol header. skb_probe_transport_header() is then called with skb->protocol still set to the outer VLAN EtherType (e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset()) already points past the VLAN tag to the inner protocol header. In __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff points past the VLAN tag. When the dissector hits case ETH_P_8021Q, it reads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that offset contains the inner protocol header (e.g. an IP header). The bytes are misinterpreted as a VLAN header, yielding a garbage encapsulated EtherType that matches no known protocol. The dissector returns false, so skb_probe_transport_header() never calls skb_set_transport_header(), leaving transport_header at its uninitialized sentinel value (~0U). Move skb_probe_transport_header() to before skb_set_network_header(). At the time skb_probe_transport_header() is called, network_header still points to the VLAN header, so nhoff correctly points to the VLAN header. The flow dissector can then parse the VLAN header, extract the inner EtherType, and advance nhoff to the inner protocol header, allowing transport_header to be set correctly.

References

NVD — CVE-2026-80906 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-80906
git.kernel.org/stable/c/01fdecc048... WEB
https://git.kernel.org/stable/c/01fdecc0480d916c799dbee584833a4a37e94d06
git.kernel.org/stable/c/5479eb9b35... WEB
https://git.kernel.org/stable/c/5479eb9b355f44745d7ccfe112386bd4f96eceea
git.kernel.org/stable/c/6386a6ffa2... WEB
https://git.kernel.org/stable/c/6386a6ffa2efba2965ed8e4fa303582c0b76a215
git.kernel.org/stable/c/6971cf3192... WEB
https://git.kernel.org/stable/c/6971cf319263d6a1b4096f9248aca9e57d77a1eb
git.kernel.org/stable/c/a4b82de96d... WEB
https://git.kernel.org/stable/c/a4b82de96d465ddb44bc931145c0fa80c4fe9c9c
git.kernel.org/stable/c/e451e20adb... WEB
https://git.kernel.org/stable/c/e451e20adb869a983a21dda158625f024142e61f
git.kernel.org/stable/c/f9297abbca... WEB
https://git.kernel.org/stable/c/f9297abbcaba760b7a7b9d63b839f607f738013e
git.kernel.org/stable/c/fa86bc52ea... WEB
https://git.kernel.org/stable/c/fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac

Frequently Asked Questions

What is CVE-2026-80906?
CVE-2026-80906 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-2026-80906?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-80906?
CVE-2026-80906 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-80906?
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-wgjr-c9mx-3f4x",
  "modified" : "2026-09-04T18:31:34Z",
  "published" : "2026-09-04T18:31:34Z",
  "aliases" : [ "CVE-2026-80906" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: packet: fix wrong transport_header when sending VLAN-tagged frame\n\nIn packet_parse_headers(), when processing a VLAN-tagged frame,\nskb_set_network_header() is called to advance network_header past the\nVLAN tag to the inner protocol header. skb_probe_transport_header() is\nthen called with skb->protocol still set to the outer VLAN EtherType\n(e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset())\nalready points past the VLAN tag to the inner protocol header.\n\nIn __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff\npoints past the VLAN tag. When the dissector hits case ETH_P_8021Q, it\nreads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that\noffset contains the inner protocol header (e.g. an IP header). The bytes\nare misinterpreted as a VLAN header, yielding a garbage encapsulated\nEtherType that matches no known protocol. The dissector returns false,\nso skb_probe_transport_header() never calls skb_set_transport_header(),\nleaving transport_header at its uninitialized sentinel value (~0U).\n\nMove skb_probe_transport_header() to before skb_set_network_header(). At\nthe time skb_probe_transport_header() is called, network_header still\npoints to the VLAN header, so nhoff correctly points to the VLAN header.\nThe flow dissector can then parse the VLAN header, extract the inner\nEtherType, and advance nhoff to the inner protocol header, allowing\ntransport_header to be set correctly.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-80906"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/01fdecc0480d916c799dbee584833a4a37e94d06"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f9297abbcaba760b7a7b9d63b839f607f738013e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-04T18:18:00Z"
  }
}