CVE-2026-45994: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-rcq2-mghh-wcf4
Share
CVSS 7.1
CWE-125
Published
Advisory Summary

CVE-2026-45994 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-2026-45994 at a Glance

CVE Identifier CVE-2026-45994
GHSA Identifier GHSA-rcq2-mghh-wcf4
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-2026-45994

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-2026-45994, 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: ibmasm: fix OOB reads in command_file_write due to missing size checks The command_file_write() handler allocates a kernel buffer of exactly count bytes and copies user data into it, but does not validate the buffer against the dot command protocol before passing it to get_dot_command_size() and get_dot_command_timeout(). Since both the allocation size (count) and the header fields (command_size, data_size) are independently user-controlled, an attacker can cause get_dot_command_size() to return a value exceeding the allocation, triggering OOB reads in get_dot_command_timeout() and an out-of-bounds memcpy_toio() that leaks kernel heap memory to the service processor. Fix with two guards: reject writes smaller than sizeof(struct dot_command_header) before allocation, then after copying user data reject commands where the buffer is smaller than the total size declared by the header (sizeof(header) + command_size + data_size). This ensures all subsequent header and payload field accesses stay within the buffer.

References

NVD — CVE-2026-45994 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45994
git.kernel.org/stable/c/0eb09f7374... WEB
https://git.kernel.org/stable/c/0eb09f737428e482a32a2e31e5e223f2b35a71d3
git.kernel.org/stable/c/44ee19422a... WEB
https://git.kernel.org/stable/c/44ee19422aa82a6847594866de7e5a31e4ef98b3
git.kernel.org/stable/c/7b8a574da5... WEB
https://git.kernel.org/stable/c/7b8a574da5d7ea99b943f7a3458a17a1d95e8838
git.kernel.org/stable/c/a672682d39... WEB
https://git.kernel.org/stable/c/a672682d39dd34e2b5ba4feb436723bed65125ff
git.kernel.org/stable/c/aefc1a97da... WEB
https://git.kernel.org/stable/c/aefc1a97da17d8309974690c8a03e439a91ebb1c
git.kernel.org/stable/c/d0fb4d1dc4... WEB
https://git.kernel.org/stable/c/d0fb4d1dc43f8d5179917a2daaa82680993d4cdf
git.kernel.org/stable/c/d50e2019c9... WEB
https://git.kernel.org/stable/c/d50e2019c9d7c433f56d9dff65703eb904aa1fb1
git.kernel.org/stable/c/ee57378914... WEB
https://git.kernel.org/stable/c/ee5737891464030a189837467df3b81a273718ad

Frequently Asked Questions

What is CVE-2026-45994?
CVE-2026-45994 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-2026-45994?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-45994?
CVE-2026-45994 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-2026-45994?
CVE-2026-45994 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-2026-45994?
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-rcq2-mghh-wcf4",
  "modified" : "2026-06-16T15:33:40Z",
  "published" : "2026-05-27T15:33:20Z",
  "aliases" : [ "CVE-2026-45994" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nibmasm: fix OOB reads in command_file_write due to missing size checks\n\nThe command_file_write() handler allocates a kernel buffer of exactly\ncount bytes and copies user data into it, but does not validate the\nbuffer against the dot command protocol before passing it to\nget_dot_command_size() and get_dot_command_timeout().\n\nSince both the allocation size (count) and the header fields (command_size,\ndata_size) are independently user-controlled, an attacker can cause\nget_dot_command_size() to return a value exceeding the allocation,\ntriggering OOB reads in get_dot_command_timeout() and an out-of-bounds\nmemcpy_toio() that leaks kernel heap memory to the service processor.\n\nFix with two guards: reject writes smaller than sizeof(struct\ndot_command_header) before allocation, then after copying user data\nreject commands where the buffer is smaller than the total size declared\nby the header (sizeof(header) + command_size + data_size). This ensures\nall subsequent header and payload field accesses stay within the buffer.",
  "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-2026-45994"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0eb09f737428e482a32a2e31e5e223f2b35a71d3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/44ee19422aa82a6847594866de7e5a31e4ef98b3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7b8a574da5d7ea99b943f7a3458a17a1d95e8838"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a672682d39dd34e2b5ba4feb436723bed65125ff"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/aefc1a97da17d8309974690c8a03e439a91ebb1c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d0fb4d1dc43f8d5179917a2daaa82680993d4cdf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d50e2019c9d7c433f56d9dff65703eb904aa1fb1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ee5737891464030a189837467df3b81a273718ad"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-27T14:17:16Z"
  }
}