CVE-2026-43502: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-mhq7-fqmq-29pq
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CVSS 7.8
CWE-401
Published
Advisory Summary

CVE-2026-43502 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-401: Missing Release of Memory after Effective Lifetime) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-43502 at a Glance

CVE Identifier CVE-2026-43502
GHSA Identifier GHSA-mhq7-fqmq-29pq
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-401: Missing Release of Memory after Effective Lifetime
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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:H/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 High (I:H)
Availability High (A:H)

How to Fix CVE-2026-43502

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-2026-43502, 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-401: Missing Release of Memory after Effective Lifetime, where the product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse. 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: net/rds: handle zerocopy send cleanup before the message is queued A zerocopy send can fail after user pages have been pinned but before the message is attached to the sending socket. The purge path currently infers zerocopy state from rm->m_rs, so an unqueued message can be cleaned up as if it owned normal payload pages. However, zerocopy ownership is really determined by the presence of op_mmp_znotifier, regardless of whether the message has reached the socket queue. Capture op_mmp_znotifier up front in rds_message_purge() and use it as the cleanup discriminator. If the message is already associated with a socket, keep the existing completion path. Otherwise, drop the pinned page accounting directly and release the notifier before putting the payload pages. This keeps early send failure cleanup consistent with the zerocopy lifetime rules without changing the normal queued completion path.

References

NVD — CVE-2026-43502 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43502
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-784472.html
git.kernel.org/stable/c/0f5c185fc7... WEB
https://git.kernel.org/stable/c/0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b
git.kernel.org/stable/c/14ef6fd18d... WEB
https://git.kernel.org/stable/c/14ef6fd18db2494098b21e0471bf27a1d8e9993e
git.kernel.org/stable/c/1e262db767... WEB
https://git.kernel.org/stable/c/1e262db7675e27f42c3f3f47d6011855f4454f24
git.kernel.org/stable/c/21d70744e6... WEB
https://git.kernel.org/stable/c/21d70744e6d3bbf9293aa1ee6fba7c53ad75275e
git.kernel.org/stable/c/3abc8983b2... WEB
https://git.kernel.org/stable/c/3abc8983b2bae3f487f77d9da5527d7d6b210d46
git.kernel.org/stable/c/44b550d88b... WEB
https://git.kernel.org/stable/c/44b550d88b267320459d518c0743a241ab2108fa
git.kernel.org/stable/c/46662f7dc5... WEB
https://git.kernel.org/stable/c/46662f7dc59475995609bf3e9d27eb36f4acf26f
git.kernel.org/stable/c/e9aefdc5c5... WEB
https://git.kernel.org/stable/c/e9aefdc5c53fe9aed108c14e3d155710a1bb14c9
Software Source Repository REPOSITORY
https://github.com/NebuSec/CyberMeowfia/tree/main/security-research/Linux-CVE-2026-43502-openSUSE-6.4.0-150600

Frequently Asked Questions

What is CVE-2026-43502?
CVE-2026-43502 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-401: Missing Release of Memory after Effective Lifetime.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-43502?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-43502?
CVE-2026-43502 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-43502?
CVE-2026-43502 is classified under CWE-401: Missing Release of Memory after Effective Lifetime (The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.).
How can I check Maven dependencies for CVE-2026-43502?
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-mhq7-fqmq-29pq",
  "modified" : "2026-10-15T03:35:53Z",
  "published" : "2026-05-21T15:34:09Z",
  "aliases" : [ "CVE-2026-43502" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: handle zerocopy send cleanup before the message is queued\n\nA zerocopy send can fail after user pages have been pinned but before\nthe message is attached to the sending socket.\n\nThe purge path currently infers zerocopy state from rm->m_rs, so an\nunqueued message can be cleaned up as if it owned normal payload pages.\nHowever, zerocopy ownership is really determined by the presence of\nop_mmp_znotifier, regardless of whether the message has reached the\nsocket queue.\n\nCapture op_mmp_znotifier up front in rds_message_purge() and use it as\nthe cleanup discriminator. If the message is already associated with a\nsocket, keep the existing completion path. Otherwise, drop the pinned\npage accounting directly and release the notifier before putting the\npayload pages.\n\nThis keeps early send failure cleanup consistent with the zerocopy\nlifetime rules without changing the normal queued completion path.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
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  "affected" : [ ],
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    "type" : "ADVISORY",
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    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b"
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    "type" : "WEB",
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e9aefdc5c53fe9aed108c14e3d155710a1bb14c9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/NebuSec/CyberMeowfia/tree/main/security-research/Linux-CVE-2026-43502-openSUSE-6.4.0-150600"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-401" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-21T13:16:19Z"
  }
}