CVE-2026-80891: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-4g2w-hpr2-f26j
Share
Published
Advisory Summary

CVE-2026-80891 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-2026-80891 at a Glance

CVE Identifier CVE-2026-80891
GHSA Identifier GHSA-4g2w-hpr2-f26j
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-2026-80891

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-2026-80891, 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: KVM: s390: pci: Validate AIBV and AISB before pinning guest pages The AIBV holds one bit per MSI-X vector for a given function. The size of the bit vector is derived from the NOI and the AIBVO. If the size of the AIBV exceeds a single page boundary, then reject the request as we cannot safely pin the guest AIBV. Similarly reject the request if the AISB address is not 8-byte aligned as the architecture requires doubleword alignment for the summary bit address. Since the AISBO can address up to 64 bits, the size of the AISB can only be 8 bytes for the function. This also ensures the AISB doesn't exceed a single page boundary.

References

NVD — CVE-2026-80891 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-80891
git.kernel.org/stable/c/15df7700dd... WEB
https://git.kernel.org/stable/c/15df7700dd99f8a37f5c6ed2dcf1e33009cdba47
git.kernel.org/stable/c/3a1c64220e... WEB
https://git.kernel.org/stable/c/3a1c64220ede4ac9ef9a3e76f008ff60a34f4c48
git.kernel.org/stable/c/868d32ac72... WEB
https://git.kernel.org/stable/c/868d32ac72cba21c5c6d8a66a814b7c25a3a5c01
git.kernel.org/stable/c/b878ba7e28... WEB
https://git.kernel.org/stable/c/b878ba7e28144c9a857bc847d31f3c45413450ac
git.kernel.org/stable/c/f00ef8efd4... WEB
https://git.kernel.org/stable/c/f00ef8efd41440129ccd88f4a1ebebf8d61d297f
git.kernel.org/stable/c/fbfe683f8b... WEB
https://git.kernel.org/stable/c/fbfe683f8b1ae7e40b56bdd6daf5bd671bc3a528

Frequently Asked Questions

What is CVE-2026-80891?
CVE-2026-80891 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-2026-80891?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-80891?
CVE-2026-80891 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-80891?
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-4g2w-hpr2-f26j",
  "modified" : "2026-09-04T18:31:33Z",
  "published" : "2026-09-04T18:31:33Z",
  "aliases" : [ "CVE-2026-80891" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: pci: Validate AIBV and AISB before pinning guest pages\n\nThe AIBV holds one bit per MSI-X vector for a given function. The size of\nthe bit vector is derived from the NOI and the AIBVO. If the size of the\nAIBV exceeds a single page boundary, then reject the request as we cannot\nsafely pin the guest AIBV.\n\nSimilarly reject the request if the AISB address is not 8-byte aligned as\nthe architecture requires doubleword alignment for the summary bit address.\nSince the AISBO can address up to 64 bits, the size of the AISB can only be\n8 bytes for the function. This also ensures the AISB doesn't exceed a\nsingle page boundary.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-80891"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/15df7700dd99f8a37f5c6ed2dcf1e33009cdba47"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3a1c64220ede4ac9ef9a3e76f008ff60a34f4c48"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/868d32ac72cba21c5c6d8a66a814b7c25a3a5c01"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b878ba7e28144c9a857bc847d31f3c45413450ac"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f00ef8efd41440129ccd88f4a1ebebf8d61d297f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fbfe683f8b1ae7e40b56bdd6daf5bd671bc3a528"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-04T18:17:57Z"
  }
}