CVE-2026-89923: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-69xh-7r26-q3mw
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Advisory Summary

CVE-2026-89923 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-2026-89923 at a Glance

CVE Identifier CVE-2026-89923
GHSA Identifier GHSA-69xh-7r26-q3mw
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-2026-89923

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-2026-89923, 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: Free guest debug data on vcpu destroy kvm_s390_clear_bp_data() is only called from kvm_arch_vcpu_ioctl_set_guest_debug(), i.e. when user space changes or disables debugging. A vCPU that is destroyed while hardware breakpoints are still armed - the normal case when the VMM just exits or crashes - leaks hw_bp_info, hw_wp_info and all old_data buffers, since generic KVM frees the vCPU right after kvm_arch_vcpu_destroy(). That is bounded by MAX_BP_COUNT entries, so roughly 8 KiB per vCPU, but it is unbounded over VM lifetimes. The allocations are GFP_KERNEL_ACCOUNT, so the charge also outlives the exiting process and pins dying memcgs. Fix by clearing the debug data on vCPU destruction. Calling it unconditionally is fine: struct kvm_vcpu is zero allocated, so for a vCPU that never enabled debugging the counters are 0 and the pointers NULL.

References

NVD — CVE-2026-89923 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89923
git.kernel.org/stable/c/053f2068cf... WEB
https://git.kernel.org/stable/c/053f2068cf9b0654b651fed5ad7649d3deb982bf
git.kernel.org/stable/c/544a5a6650... WEB
https://git.kernel.org/stable/c/544a5a665019cef394ce8bda97fa7a2cab253781
git.kernel.org/stable/c/6c996b12bb... WEB
https://git.kernel.org/stable/c/6c996b12bbe4a6023076e8eee3cfaf2cc99db76c
git.kernel.org/stable/c/9a32c4c6a6... WEB
https://git.kernel.org/stable/c/9a32c4c6a6c23b7f5bf765eb5b83ba7f64a8ec63
git.kernel.org/stable/c/b5acacfdb8... WEB
https://git.kernel.org/stable/c/b5acacfdb8966abff91836c1c5bd7da59d8a526e
git.kernel.org/stable/c/d6280fc540... WEB
https://git.kernel.org/stable/c/d6280fc540d8f4653c9b54a78cb747e128070f5e
git.kernel.org/stable/c/e4d8b7f176... WEB
https://git.kernel.org/stable/c/e4d8b7f176b976474e0800ba71ee2dfa3ce263c9
git.kernel.org/stable/c/e7f698b09d... WEB
https://git.kernel.org/stable/c/e7f698b09d4a7c36b299acf680fc50fe868e2bcd

Frequently Asked Questions

What is CVE-2026-89923?
CVE-2026-89923 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-2026-89923?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-89923?
CVE-2026-89923 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89923?
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 
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  "id" : "GHSA-69xh-7r26-q3mw",
  "modified" : "2026-09-16T12:30:41Z",
  "published" : "2026-09-16T12:30:41Z",
  "aliases" : [ "CVE-2026-89923" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Free guest debug data on vcpu destroy\n\nkvm_s390_clear_bp_data() is only called from\nkvm_arch_vcpu_ioctl_set_guest_debug(), i.e. when user space changes or\ndisables debugging. A vCPU that is destroyed while hardware breakpoints\nare still armed - the normal case when the VMM just exits or crashes -\nleaks hw_bp_info, hw_wp_info and all old_data buffers, since generic KVM\nfrees the vCPU right after kvm_arch_vcpu_destroy().\n\nThat is bounded by MAX_BP_COUNT entries, so roughly 8 KiB per vCPU, but\nit is unbounded over VM lifetimes. The allocations are\nGFP_KERNEL_ACCOUNT, so the charge also outlives the exiting process and\npins dying memcgs.\n\nFix by clearing the debug data on vCPU destruction. Calling it\nunconditionally is fine: struct kvm_vcpu is zero allocated, so for a vCPU\nthat never enabled debugging the counters are 0 and the pointers NULL.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89923"
  }, {
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    "url" : "https://git.kernel.org/stable/c/053f2068cf9b0654b651fed5ad7649d3deb982bf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/544a5a665019cef394ce8bda97fa7a2cab253781"
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    "url" : "https://git.kernel.org/stable/c/6c996b12bbe4a6023076e8eee3cfaf2cc99db76c"
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  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-16T11:17:01Z"
  }
}