CVE-2026-89731: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-qhph-j75q-5546
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CVSS 7.1
Published
Advisory Summary

CVE-2026-89731 is a HIGH (CVSS 7.1) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89731 at a Glance

CVE Identifier CVE-2026-89731
GHSA Identifier GHSA-qhph-j75q-5546
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-89731

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-2026-89731, 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: cxl/ras: Fix cxl_rch_get_aer_info() out-of-bounds AER register read cxl_rch_get_aer_info() copies the RCH Downstream Port AER capability from the RCRB MMIO block using a readl() loop bounded by sizeof(struct aer_capability_regs). This struct is a software layout and its embedded struct pcie_tlp_log is larger than the on-wire AER capability. As a result the loop reads past the mapped AER register block. The over-read also populates the software-only tail fields including header_log.header_len. An out-of-range header_len passed to pcie_print_tlp_log() can then loop past the header log buffer and cause a second out-of-bounds read. The read was correct when introduced, but struct pcie_tlp_log has since grown (Header Log and TLP Prefix Log sizes, header_len and flit fields), so sizeof(struct aer_capability_regs) no longer matches the physical AER capability. Bound the read to the physical AER registers, header through the 16 byte Header Log. Zero the destination first so the software-only fields are deterministic.

References

NVD — CVE-2026-89731 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89731
git.kernel.org/stable/c/29458e62d0... WEB
https://git.kernel.org/stable/c/29458e62d0829cbc99435f3e44fd560f9bbf1da7
git.kernel.org/stable/c/7f5a2a330d... WEB
https://git.kernel.org/stable/c/7f5a2a330dde8e8aa2dd80e1f3e05b6ada049607
git.kernel.org/stable/c/8bd3523df1... WEB
https://git.kernel.org/stable/c/8bd3523df1319edc61cd391e695c84a4618516df
git.kernel.org/stable/c/8e3d9dbb25... WEB
https://git.kernel.org/stable/c/8e3d9dbb25d3ddbe72b4542ec4f7c4e622fe0ced

Frequently Asked Questions

What is CVE-2026-89731?
CVE-2026-89731 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-2026-89731?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89731?
CVE-2026-89731 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
What CWE is associated with CVE-2026-89731?
CVE-2026-89731 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89731?
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-qhph-j75q-5546",
  "modified" : "2026-09-21T15:31:37Z",
  "published" : "2026-09-11T21:31:38Z",
  "aliases" : [ "CVE-2026-89731" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/ras: Fix cxl_rch_get_aer_info() out-of-bounds AER register read\n\ncxl_rch_get_aer_info() copies the RCH Downstream Port AER capability from\nthe RCRB MMIO block using a readl() loop bounded by sizeof(struct\naer_capability_regs). This struct is a software layout and its embedded\nstruct pcie_tlp_log is larger than the on-wire AER capability. As a\nresult the loop reads past the mapped AER register block.\n\nThe over-read also populates the software-only tail fields including\nheader_log.header_len. An out-of-range header_len passed to\npcie_print_tlp_log() can then loop past the header log buffer and cause\na second out-of-bounds read.\n\nThe read was correct when introduced, but struct pcie_tlp_log has since\ngrown (Header Log and TLP Prefix Log sizes, header_len and flit fields),\nso sizeof(struct aer_capability_regs) no longer matches the physical AER\ncapability.\n\nBound the read to the physical AER registers, header through the 16 byte\nHeader Log. Zero the destination first so the software-only fields are\ndeterministic.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89731"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/29458e62d0829cbc99435f3e44fd560f9bbf1da7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7f5a2a330dde8e8aa2dd80e1f3e05b6ada049607"
  }, {
    "type" : "WEB",
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8e3d9dbb25d3ddbe72b4542ec4f7c4e622fe0ced"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:20:03Z"
  }
}