CVE-2026-98306: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-8vq5-3gc9-33qh
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Advisory Summary

CVE-2026-98306 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-2026-98306 at a Glance

CVE Identifier CVE-2026-98306
GHSA Identifier GHSA-8vq5-3gc9-33qh
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-2026-98306

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-2026-98306, 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: seg6: set IPSKB_L3SLAVE from IP6SKB_L3SLAVE on IPIP decapsulation When an SRv6 packet arrives on an interface enslaved to a VRF, vrf_ip6_rcv() sets IP6SKB_L3SLAVE in IP6CB, but decap_and_validate() has never set IPSKB_L3SLAVE in IPCB. The bit stayed clear in the common case, and with CONFIG_IPV6_MIP6 the leftover frag_max_size of a reassembled outer packet could even set it, with no VRF involved. Commit 44930446dde4 ("ipv6: seg6: clear IPv4 control block on IPIP decapsulation") then made the unreliable bit reliably clear. The effect of the missing flag is visible with End.DX4 when a delivery to a local address of the node reaches the socket lookup. For example, a UDP socket bound to the enslaved ingress interface does not receive any of the decapsulated packets, while an unbound socket outside the VRF does. This contradicts Documentation/networking/vrf.rst: by default the scope of an unbound UDP or TCP socket is limited to the default VRF. Set IPSKB_L3SLAVE for IPv4 in decap_and_validate(), which already does the same for IPv6. The socket lookup then matches the decapsulated packet like any other packet received on that enslaved interface. Such a packet matches an unbound UDP or TCP socket only when udp_l3mdev_accept or tcp_l3mdev_accept is set.

References

NVD — CVE-2026-98306 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98306
git.kernel.org/stable/c/1d9f5c7890... WEB
https://git.kernel.org/stable/c/1d9f5c78903dd25a3556229eb716dd465c5f3573
git.kernel.org/stable/c/5130afa025... WEB
https://git.kernel.org/stable/c/5130afa025c95faa621adf8bac525baeb2b290d2
git.kernel.org/stable/c/72f4106160... WEB
https://git.kernel.org/stable/c/72f410616000d21a0a6ec6c93a60301b9c92e95c
git.kernel.org/stable/c/7616242a2b... WEB
https://git.kernel.org/stable/c/7616242a2b37883f7322aaa1d2bd6cd0fed28315
git.kernel.org/stable/c/8c16e1ccc0... WEB
https://git.kernel.org/stable/c/8c16e1ccc082a3763dfc6bc2d3f658c1a6336f9d
git.kernel.org/stable/c/ddf60220c9... WEB
https://git.kernel.org/stable/c/ddf60220c925b54a1714c4722fdbdb12833232d0
git.kernel.org/stable/c/e4d7c52f15... WEB
https://git.kernel.org/stable/c/e4d7c52f15f572608374947c6c802052e1a2fc82
git.kernel.org/stable/c/f8fb4738cc... WEB
https://git.kernel.org/stable/c/f8fb4738ccef5f9d107845b05734a56352747b1a

Frequently Asked Questions

What is CVE-2026-98306?
CVE-2026-98306 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-2026-98306?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98306?
CVE-2026-98306 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98306?
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-8vq5-3gc9-33qh",
  "modified" : "2026-10-06T09:31:34Z",
  "published" : "2026-10-06T09:31:34Z",
  "aliases" : [ "CVE-2026-98306" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nseg6: set IPSKB_L3SLAVE from IP6SKB_L3SLAVE on IPIP decapsulation\n\nWhen an SRv6 packet arrives on an interface enslaved to a VRF,\nvrf_ip6_rcv() sets IP6SKB_L3SLAVE in IP6CB, but decap_and_validate()\nhas never set IPSKB_L3SLAVE in IPCB. The bit stayed clear in the\ncommon case, and with CONFIG_IPV6_MIP6 the leftover frag_max_size of\na reassembled outer packet could even set it, with no VRF involved.\nCommit 44930446dde4 (\"ipv6: seg6: clear IPv4 control block on IPIP\ndecapsulation\") then made the unreliable bit reliably clear.\n\nThe effect of the missing flag is visible with End.DX4 when a\ndelivery to a local address of the node reaches the socket lookup.\nFor example, a UDP socket bound to the enslaved ingress interface\ndoes not receive any of the decapsulated packets, while an unbound\nsocket outside the VRF does.\nThis contradicts Documentation/networking/vrf.rst: by default the\nscope of an unbound UDP or TCP socket is limited to the default VRF.\n\nSet IPSKB_L3SLAVE for IPv4 in decap_and_validate(), which already does\nthe same for IPv6. The socket lookup then matches the decapsulated\npacket like any other packet received on that enslaved interface. Such\na packet matches an unbound UDP or TCP socket only when\nudp_l3mdev_accept or tcp_l3mdev_accept is set.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98306"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1d9f5c78903dd25a3556229eb716dd465c5f3573"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5130afa025c95faa621adf8bac525baeb2b290d2"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/72f410616000d21a0a6ec6c93a60301b9c92e95c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7616242a2b37883f7322aaa1d2bd6cd0fed28315"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8c16e1ccc082a3763dfc6bc2d3f658c1a6336f9d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ddf60220c925b54a1714c4722fdbdb12833232d0"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e4d7c52f15f572608374947c6c802052e1a2fc82"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f8fb4738ccef5f9d107845b05734a56352747b1a"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-06T09:18:21Z"
  }
}