CVE-2026-72398: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-59hc-5687-r27h
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CVSS 9.8
Published
Advisory Summary

CVE-2026-72398 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-2026-72398 at a Glance

CVE Identifier CVE-2026-72398
GHSA Identifier GHSA-59hc-5687-r27h
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-2026-72398

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-2026-72398, 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: sctp: add INIT verification after cookie unpacking In SCTP handshake, the INIT chunk is initially processed by the server and embedded into the cookie carried in INIT-ACK. The client then returns this cookie via COOKIE-ECHO, where the server unpacks it and reconstructs the original INIT chunk. When cookie authentication is enabled, the cookie contents are protected against tampering, so reusing the unpacked INIT without re-verification is safe. However, when cookie authentication is disabled, the reconstructed INIT can no longer be trusted. In this case, the INIT must be explicitly validated after unpacking to avoid processing potentially tampered data. Add sctp_verify_init() checks after cookie unpacking in COOKIE-ECHO processing paths (sctp_sf_do_5_1D_ce() and sctp_sf_do_5_2_4_dupcook()) when cookie_auth_enable is disabled. On failure, the new association is freed and the packet is discarded. Also tighten cookie validation in sctp_unpack_cookie() by verifying the embedded chunk type is SCTP_CID_INIT before treating it as an INIT chunk. Finally, update sctp_verify_init() to validate parameter bounds using the actual embedded INIT length instead of chunk->chunk_end, since the INIT stored in COOKIE-ECHO may not span the entire chunk buffer.

References

NVD — CVE-2026-72398 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72398
git.kernel.org/stable/c/062bcbf8d1... WEB
https://git.kernel.org/stable/c/062bcbf8d1f1051fdeb20b94920031b0e2cb95a2
git.kernel.org/stable/c/414c5447fe... WEB
https://git.kernel.org/stable/c/414c5447fe6a200613dd46d7fdc8454622076cb1
git.kernel.org/stable/c/bca3100f55... WEB
https://git.kernel.org/stable/c/bca3100f550281c2f2418652338bced3b35af0e6

Frequently Asked Questions

What is CVE-2026-72398?
CVE-2026-72398 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-2026-72398?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-72398?
CVE-2026-72398 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-2026-72398?
CVE-2026-72398 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-72398?
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-59hc-5687-r27h",
  "modified" : "2026-08-17T06:33:27Z",
  "published" : "2026-08-15T06:32:22Z",
  "aliases" : [ "CVE-2026-72398" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: add INIT verification after cookie unpacking\n\nIn SCTP handshake, the INIT chunk is initially processed by the server\nand embedded into the cookie carried in INIT-ACK. The client then\nreturns this cookie via COOKIE-ECHO, where the server unpacks it and\nreconstructs the original INIT chunk.\n\nWhen cookie authentication is enabled, the cookie contents are protected\nagainst tampering, so reusing the unpacked INIT without re-verification\nis safe.\n\nHowever, when cookie authentication is disabled, the reconstructed INIT\ncan no longer be trusted. In this case, the INIT must be explicitly\nvalidated after unpacking to avoid processing potentially tampered data.\n\nAdd sctp_verify_init() checks after cookie unpacking in COOKIE-ECHO\nprocessing paths (sctp_sf_do_5_1D_ce() and sctp_sf_do_5_2_4_dupcook())\nwhen cookie_auth_enable is disabled. On failure, the new association is\nfreed and the packet is discarded.\n\nAlso tighten cookie validation in sctp_unpack_cookie() by verifying the\nembedded chunk type is SCTP_CID_INIT before treating it as an INIT\nchunk.\n\nFinally, update sctp_verify_init() to validate parameter bounds using\nthe actual embedded INIT length instead of chunk->chunk_end, since the\nINIT stored in COOKIE-ECHO may not span the entire chunk buffer.",
  "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-2026-72398"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/062bcbf8d1f1051fdeb20b94920031b0e2cb95a2"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/414c5447fe6a200613dd46d7fdc8454622076cb1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/bca3100f550281c2f2418652338bced3b35af0e6"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T06:22:13Z"
  }
}