CVE-2026-45851: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-r9jv-8h68-mr7c
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CVSS 7.1
CWE-125
Published
Advisory Summary

CVE-2026-45851 is a HIGH (CVSS 7.1) security vulnerability vulnerability (CWE-125: Out-of-bounds Read) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product reads data past the end, or before the beginning, of the intended buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-45851 at a Glance

CVE Identifier CVE-2026-45851
GHSA Identifier GHSA-r9jv-8h68-mr7c
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-125: Out-of-bounds Read
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-2026-45851

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-2026-45851, 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 CWE-125: Out-of-bounds Read, where the product reads data past the end, or before the beginning, of the intended buffer. 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: efi: Fix reservation of unaccepted memory table The reserve_unaccepted() function incorrectly calculates the size of the memblock reservation for the unaccepted memory table. It aligns the size of the table, but fails to account for cases where the table's starting physical address (efi.unaccepted) is not page-aligned. If the table starts at an offset within a page and its end crosses into a subsequent page that the aligned size does not cover, the end of the table will not be reserved. This can lead to the table being overwritten or inaccessible, causing a kernel panic in accept_memory(). This issue was observed when starting Intel TDX VMs with specific memory sizes (e.g., > 64GB). Fix this by calculating the end address first (including the unaligned start) and then aligning it up, ensuring the entire range is covered by the reservation.

References

NVD — CVE-2026-45851 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45851
git.kernel.org/stable/c/0862438c90... WEB
https://git.kernel.org/stable/c/0862438c90487e79822d5647f854977d50381505
git.kernel.org/stable/c/9b18bf5997... WEB
https://git.kernel.org/stable/c/9b18bf59977f5c5bc3b11b210520f62500a7adf3
git.kernel.org/stable/c/b7bc182ec1... WEB
https://git.kernel.org/stable/c/b7bc182ec1846be437351e44164089d988f9d0dd
git.kernel.org/stable/c/ba6b6f1502... WEB
https://git.kernel.org/stable/c/ba6b6f1502fa55621d1db23f253d54322bdbe4e0
git.kernel.org/stable/c/e649b59167... WEB
https://git.kernel.org/stable/c/e649b5916725c68f44ebf45fb396df563c5dbaf2

Frequently Asked Questions

What is CVE-2026-45851?
CVE-2026-45851 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-125: Out-of-bounds Read.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-45851?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-45851?
CVE-2026-45851 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-2026-45851?
CVE-2026-45851 is classified under CWE-125: Out-of-bounds Read (The product reads data past the end, or before the beginning, of the intended buffer.).
How can I check Maven dependencies for CVE-2026-45851?
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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  "schema_version" : "1.4.0",
  "id" : "GHSA-r9jv-8h68-mr7c",
  "modified" : "2026-06-25T21:31:18Z",
  "published" : "2026-05-27T15:33:13Z",
  "aliases" : [ "CVE-2026-45851" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nefi: Fix reservation of unaccepted memory table\n\nThe reserve_unaccepted() function incorrectly calculates the size of the\nmemblock reservation for the unaccepted memory table. It aligns the\nsize of the table, but fails to account for cases where the table's\nstarting physical address (efi.unaccepted) is not page-aligned.\n\nIf the table starts at an offset within a page and its end crosses into\na subsequent page that the aligned size does not cover, the end of the\ntable will not be reserved. This can lead to the table being overwritten\nor inaccessible, causing a kernel panic in accept_memory().\n\nThis issue was observed when starting Intel TDX VMs with specific memory\nsizes (e.g., > 64GB).\n\nFix this by calculating the end address first (including the unaligned\nstart) and then aligning it up, ensuring the entire range is covered\nby the reservation.",
  "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-2026-45851"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0862438c90487e79822d5647f854977d50381505"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9b18bf59977f5c5bc3b11b210520f62500a7adf3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b7bc182ec1846be437351e44164089d988f9d0dd"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ba6b6f1502fa55621d1db23f253d54322bdbe4e0"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e649b5916725c68f44ebf45fb396df563c5dbaf2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-27T14:16:57Z"
  }
}