CVE-2026-43278: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-vwc3-h3w8-q85f
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CVSS 7.8
CWE-415
Published
Advisory Summary

CVE-2026-43278 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-415: Double Free) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product calls free() twice on the same memory address.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-43278 at a Glance

CVE Identifier CVE-2026-43278
GHSA Identifier GHSA-vwc3-h3w8-q85f
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-415: Double Free
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-2026-43278

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-2026-43278, 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-415: Double Free, where the product calls free() twice on the same memory address. 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: dm: clear cloned request bio pointer when last clone bio completes Stale rq->bio values have been observed to cause double-initialization of cloned bios in request-based device-mapper targets, leading to use-after-free and double-free scenarios. One such case occurs when using dm-multipath on top of a PCIe NVMe namespace, where cloned request bios are freed during blk_complete_request(), but rq->bio is left intact. Subsequent clone teardown then attempts to free the same bios again via blk_rq_unprep_clone(). The resulting double-free path looks like: nvme_pci_complete_batch() nvme_complete_batch() blk_mq_end_request_batch() blk_complete_request() // called on a DM clone request bio_endio() // first free of all clone bios ... rq->end_io() // end_clone_request() dm_complete_request(tio->orig) dm_softirq_done() dm_done() dm_end_request() blk_rq_unprep_clone() // second free of clone bios Fix this by clearing the clone request's bio pointer when the last cloned bio completes, ensuring that later teardown paths do not attempt to free already-released bios.

References

NVD — CVE-2026-43278 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43278
git.kernel.org/stable/c/3d746b639b... WEB
https://git.kernel.org/stable/c/3d746b639be4b4f5cd8ce2b06aa52dc443f50edc
git.kernel.org/stable/c/7daf279c67... WEB
https://git.kernel.org/stable/c/7daf279c674d515fb22a727a7bbc92aeb35c5442
git.kernel.org/stable/c/83d7209180... WEB
https://git.kernel.org/stable/c/83d72091804600ead96dc9e9f518ea56cb4942f6
git.kernel.org/stable/c/8d9ddad561... WEB
https://git.kernel.org/stable/c/8d9ddad561136f7e6a9346767bf97b4d79e38e67
git.kernel.org/stable/c/9a95b98202... WEB
https://git.kernel.org/stable/c/9a95b98202113045bc1a5bcb30388a500f25e050
git.kernel.org/stable/c/b1c1a2637e... WEB
https://git.kernel.org/stable/c/b1c1a2637ebd675aa2d71fee8c70da8791d73850
git.kernel.org/stable/c/e2e738e8df... WEB
https://git.kernel.org/stable/c/e2e738e8dfbbf83bd2bae0467ec4420cc52da42a
git.kernel.org/stable/c/fb8a6c18fb... WEB
https://git.kernel.org/stable/c/fb8a6c18fb9a6561f7a15b58b272442b77a242dd

Frequently Asked Questions

What is CVE-2026-43278?
CVE-2026-43278 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-415: Double Free.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-43278?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-43278?
CVE-2026-43278 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-2026-43278?
CVE-2026-43278 is classified under CWE-415: Double Free (The product calls free() twice on the same memory address.).
How can I check Maven dependencies for CVE-2026-43278?
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-vwc3-h3w8-q85f",
  "modified" : "2026-05-08T15:31:19Z",
  "published" : "2026-05-06T12:30:35Z",
  "aliases" : [ "CVE-2026-43278" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ndm: clear cloned request bio pointer when last clone bio completes\n\nStale rq->bio values have been observed to cause double-initialization of\ncloned bios in request-based device-mapper targets, leading to\nuse-after-free and double-free scenarios.\n\nOne such case occurs when using dm-multipath on top of a PCIe NVMe\nnamespace, where cloned request bios are freed during\nblk_complete_request(), but rq->bio is left intact. Subsequent clone\nteardown then attempts to free the same bios again via\nblk_rq_unprep_clone().\n\nThe resulting double-free path looks like:\n\n  nvme_pci_complete_batch()\n    nvme_complete_batch()\n      blk_mq_end_request_batch()\n        blk_complete_request()        // called on a DM clone request\n          bio_endio()                 // first free of all clone bios\n          ...\n        rq->end_io()                  // end_clone_request()\n          dm_complete_request(tio->orig)\n            dm_softirq_done()\n              dm_done()\n                dm_end_request()\n                  blk_rq_unprep_clone()  // second free of clone bios\n\nFix this by clearing the clone request's bio pointer when the last cloned\nbio completes, ensuring that later teardown paths do not attempt to free\nalready-released bios.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-43278"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3d746b639be4b4f5cd8ce2b06aa52dc443f50edc"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7daf279c674d515fb22a727a7bbc92aeb35c5442"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/83d72091804600ead96dc9e9f518ea56cb4942f6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8d9ddad561136f7e6a9346767bf97b4d79e38e67"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9a95b98202113045bc1a5bcb30388a500f25e050"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b1c1a2637ebd675aa2d71fee8c70da8791d73850"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e2e738e8dfbbf83bd2bae0467ec4420cc52da42a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fb8a6c18fb9a6561f7a15b58b272442b77a242dd"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-415" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-06T12:16:49Z"
  }
}