CVE-2026-45987: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-x4f8-qj9g-g99w
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CVSS 5.5
Published
Advisory Summary

CVE-2026-45987 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-45987 at a Glance

CVE Identifier CVE-2026-45987
GHSA Identifier GHSA-x4f8-qj9g-g99w
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

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:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-45987

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-2026-45987, 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: nSVM: Sync interrupt shadow to cached vmcb12 after VMRUN of L2 After VMRUN in guest mode, nested_sync_control_from_vmcb02() syncs fields written by the CPU from vmcb02 to the cached vmcb12. This is because the cached vmcb12 is used as the authoritative copy of some of the controls, and is the payload when saving/restoring nested state. int_state is also written by the CPU, specifically bit 0 (i.e. SVM_INTERRUPT_SHADOW_MASK) for nested VMs, but it is not sync'd to cached vmcb12. This does not cause a problem if KVM_SET_NESTED_STATE preceeds KVM_SET_VCPU_EVENTS in the restore path, as an interrupt shadow would be correctly restored to vmcb02 (KVM_SET_VCPU_EVENTS overwrites what KVM_SET_NESTED_STATE restored in int_state). However, if KVM_SET_VCPU_EVENTS preceeds KVM_SET_NESTED_STATE, an interrupt shadow would be restored into vmcb01 instead of vmcb02. This would mostly be benign for L1 (delays an interrupt), but not for L2. For L2, the vCPU could hang (e.g. if a wakeup interrupt is delivered before a HLT that should have been in an interrupt shadow). Sync int_state to the cached vmcb12 in nested_sync_control_from_vmcb02() to avoid this problem. With that, KVM_SET_NESTED_STATE restores the correct interrupt shadow state, and if KVM_SET_VCPU_EVENTS follows it would overwrite it with the same value.

References

NVD — CVE-2026-45987 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45987
git.kernel.org/stable/c/03bee264f8... WEB
https://git.kernel.org/stable/c/03bee264f8ebfd39e0254c98e112d033a7aa9055
git.kernel.org/stable/c/0c1f74d8b7... WEB
https://git.kernel.org/stable/c/0c1f74d8b74d8a31751fb6ea5417e48e02c93b58
git.kernel.org/stable/c/1709418535... WEB
https://git.kernel.org/stable/c/1709418535a8df95532999d61b03d59975280258
git.kernel.org/stable/c/2f950eeb27... WEB
https://git.kernel.org/stable/c/2f950eeb27af6885416232761700b8820cae0a61
git.kernel.org/stable/c/497f6af967... WEB
https://git.kernel.org/stable/c/497f6af9679fc9c6ce2f438e11ed5d51b1aa8297
git.kernel.org/stable/c/4b44aa1a13... WEB
https://git.kernel.org/stable/c/4b44aa1a134e499c4517597118378b308602a16c
git.kernel.org/stable/c/e0377e52f3... WEB
https://git.kernel.org/stable/c/e0377e52f3c10ee572732d11b04625b7f517a862
git.kernel.org/stable/c/e39a77a9b1... WEB
https://git.kernel.org/stable/c/e39a77a9b1e17d2d831c304eafac4c41a784a0be

Frequently Asked Questions

What is CVE-2026-45987?
CVE-2026-45987 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-2026-45987?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-45987?
CVE-2026-45987 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-45987?
CVE-2026-45987 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-45987?
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-x4f8-qj9g-g99w",
  "modified" : "2026-06-16T15:33:39Z",
  "published" : "2026-05-27T15:33:19Z",
  "aliases" : [ "CVE-2026-45987" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nSVM: Sync interrupt shadow to cached vmcb12 after VMRUN of L2\n\nAfter VMRUN in guest mode, nested_sync_control_from_vmcb02() syncs\nfields written by the CPU from vmcb02 to the cached vmcb12. This is\nbecause the cached vmcb12 is used as the authoritative copy of some of\nthe controls, and is the payload when saving/restoring nested state.\n\nint_state is also written by the CPU, specifically bit 0 (i.e.\nSVM_INTERRUPT_SHADOW_MASK) for nested VMs, but it is not sync'd to\ncached vmcb12. This does not cause a problem if KVM_SET_NESTED_STATE\npreceeds KVM_SET_VCPU_EVENTS in the restore path, as an interrupt shadow\nwould be correctly restored to vmcb02 (KVM_SET_VCPU_EVENTS overwrites\nwhat KVM_SET_NESTED_STATE restored in int_state).\n\nHowever, if KVM_SET_VCPU_EVENTS preceeds KVM_SET_NESTED_STATE, an\ninterrupt shadow would be restored into vmcb01 instead of vmcb02. This\nwould mostly be benign for L1 (delays an interrupt), but not for L2. For\nL2, the vCPU could hang (e.g. if a wakeup interrupt is delivered before\na HLT that should have been in an interrupt shadow).\n\nSync int_state to the cached vmcb12 in nested_sync_control_from_vmcb02()\nto avoid this problem. With that, KVM_SET_NESTED_STATE restores the\ncorrect interrupt shadow state, and if KVM_SET_VCPU_EVENTS follows it\nwould overwrite it with the same value.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/03bee264f8ebfd39e0254c98e112d033a7aa9055"
  }, {
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    "url" : "https://git.kernel.org/stable/c/0c1f74d8b74d8a31751fb6ea5417e48e02c93b58"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1709418535a8df95532999d61b03d59975280258"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/497f6af9679fc9c6ce2f438e11ed5d51b1aa8297"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4b44aa1a134e499c4517597118378b308602a16c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e0377e52f3c10ee572732d11b04625b7f517a862"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e39a77a9b1e17d2d831c304eafac4c41a784a0be"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-27T14:17:16Z"
  }
}