CVE-2026-46155: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-r5mc-mc43-5gch
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CVSS 9.1
CWE-125
Published
Advisory Summary

CVE-2026-46155 is a CRITICAL (CVSS 9.1) 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-2026-46155 at a Glance

CVE Identifier CVE-2026-46155
GHSA Identifier GHSA-r5mc-mc43-5gch
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-125: Out-of-bounds Read
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.1

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2026-46155

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-2026-46155, 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: smb/client: fix out-of-bounds read in smb2_compound_op() If a server sends a truncated response but a large OutputBufferLength, and terminates the EA list early, check_wsl_eas() returns success without validating that the entire OutputBufferLength fits within iov_len. Then smb2_compound_op() does: memcpy(idata->wsl.eas, data[0], size[0]); Where size[0] is OutputBufferLength. If iov_len is smaller than size[0], memcpy can read beyond the end of the rsp_iov allocation and leak adjacent kernel heap memory.

References

NVD — CVE-2026-46155 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46155
git.kernel.org/stable/c/512d33bc8e... WEB
https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926
git.kernel.org/stable/c/8d09328dfd... WEB
https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996b
git.kernel.org/stable/c/9b3af35645... WEB
https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25f
git.kernel.org/stable/c/a16f70a71b... WEB
https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c
git.kernel.org/stable/c/dffb44b2e0... WEB
https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1c

Frequently Asked Questions

What is CVE-2026-46155?
CVE-2026-46155 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-2026-46155?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-46155?
CVE-2026-46155 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
What CWE is associated with CVE-2026-46155?
CVE-2026-46155 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-2026-46155?
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-r5mc-mc43-5gch",
  "modified" : "2026-05-30T12:30:25Z",
  "published" : "2026-05-28T12:30:30Z",
  "aliases" : [ "CVE-2026-46155" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: fix out-of-bounds read in smb2_compound_op()\n\nIf a server sends a truncated response but a large OutputBufferLength, and\nterminates the EA list early, check_wsl_eas() returns success without\nvalidating that the entire OutputBufferLength fits within iov_len.\n\nThen smb2_compound_op() does:\n    memcpy(idata->wsl.eas, data[0], size[0]);\n\nWhere size[0] is OutputBufferLength. If iov_len is smaller than size[0],\nmemcpy can read beyond the end of the rsp_iov allocation and leak adjacent\nkernel heap memory.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-46155"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1c"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-28T10:16:31Z"
  }
}