CVE-2026-89565: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-x2xj-xv7g-fj5c
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Advisory Summary

CVE-2026-89565 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-2026-89565 at a Glance

CVE Identifier CVE-2026-89565
GHSA Identifier GHSA-x2xj-xv7g-fj5c
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-2026-89565

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-2026-89565, 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: ipip: fix skb leak in collect_md mode when metadata_dst allocation fails In collect_md mode ipip_tunnel_rcv() returns 0 without freeing the skb when ip_tun_rx_dst() fails to allocate the metadata_dst. ipip_rcv() and mplsip_rcv() are registered as xfrm_tunnel handlers, so tunnel4_rcv() and tunnelmpls4_rcv() read the zero return as "the packet has been consumed" and do not free it either. The skb is leaked. The other tunnel drivers all dispose of the packet at this point: ip6_tunnel.c jumps to its drop label, ip_gre.c and ip6_gre.c return PACKET_REJECT, which makes gre_rcv() free the skb. Only ipip returns 0. Jump to the existing drop label instead. It frees the skb and still returns 0, so the packet keeps being reported as consumed, which is what we want here: the outer header has already been pulled, and neither the remaining handlers nor an ICMP unreachable have any use for it. Triggering this needs an ipip or mplsip tunnel in collect_md mode and an atomic allocation failure, which is why it has gone unnoticed.

References

NVD — CVE-2026-89565 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89565
git.kernel.org/stable/c/1909df2d06... WEB
https://git.kernel.org/stable/c/1909df2d066424767429e13053eb9701263430ef
git.kernel.org/stable/c/31e4be21da... WEB
https://git.kernel.org/stable/c/31e4be21dacee49395013caae28576484a049a4f
git.kernel.org/stable/c/6776efe4a5... WEB
https://git.kernel.org/stable/c/6776efe4a52f289a3fc18f8adf19b035a7d8e1bb
git.kernel.org/stable/c/6d8c5b266d... WEB
https://git.kernel.org/stable/c/6d8c5b266d0035a061573843a7243be068eb6118
git.kernel.org/stable/c/c4dc23de4c... WEB
https://git.kernel.org/stable/c/c4dc23de4cc75e4e304170b31bb8aeeacd5cb990
git.kernel.org/stable/c/fd01f1a3ed... WEB
https://git.kernel.org/stable/c/fd01f1a3ed4a189a784654f7c69eb565872f2e12

Frequently Asked Questions

What is CVE-2026-89565?
CVE-2026-89565 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-2026-89565?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-89565?
CVE-2026-89565 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89565?
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-x2xj-xv7g-fj5c",
  "modified" : "2026-09-14T15:32:29Z",
  "published" : "2026-09-11T21:31:32Z",
  "aliases" : [ "CVE-2026-89565" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nipip: fix skb leak in collect_md mode when metadata_dst allocation fails\n\nIn collect_md mode ipip_tunnel_rcv() returns 0 without freeing the skb\nwhen ip_tun_rx_dst() fails to allocate the metadata_dst. ipip_rcv() and\nmplsip_rcv() are registered as xfrm_tunnel handlers, so tunnel4_rcv()\nand tunnelmpls4_rcv() read the zero return as \"the packet has been\nconsumed\" and do not free it either. The skb is leaked.\n\nThe other tunnel drivers all dispose of the packet at this point:\nip6_tunnel.c jumps to its drop label, ip_gre.c and ip6_gre.c return\nPACKET_REJECT, which makes gre_rcv() free the skb. Only ipip returns 0.\n\nJump to the existing drop label instead. It frees the skb and still\nreturns 0, so the packet keeps being reported as consumed, which is what\nwe want here: the outer header has already been pulled, and neither the\nremaining handlers nor an ICMP unreachable have any use for it.\n\nTriggering this needs an ipip or mplsip tunnel in collect_md mode and an\natomic allocation failure, which is why it has gone unnoticed.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89565"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1909df2d066424767429e13053eb9701263430ef"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/31e4be21dacee49395013caae28576484a049a4f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6776efe4a52f289a3fc18f8adf19b035a7d8e1bb"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6d8c5b266d0035a061573843a7243be068eb6118"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c4dc23de4cc75e4e304170b31bb8aeeacd5cb990"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fd01f1a3ed4a189a784654f7c69eb565872f2e12"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:40Z"
  }
}