CVE-2026-43284: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-mmw8-mxmc-8w2r
Share
CVSS 7.8
CWE-123
Published
Advisory Summary

CVE-2026-43284 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-123: Write-what-where Condition) affecting Software libraries in the Maven ecosystem. The weakness occurs when any condition where the attacker has the ability to write an arbitrary value to an arbitrary location, often as the result of a buffer overflow.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-43284 at a Glance

CVE Identifier CVE-2026-43284
GHSA Identifier GHSA-mmw8-mxmc-8w2r
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-123: Write-what-where Condition
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:H/PR:L/UI:N/S:C/C:H/I:H/A:H).

Attack Vector Local (AV:L)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-43284

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-2026-43284, 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-123: Write-what-where Condition, where any condition where the attacker has the ability to write an arbitrary value to an arbitrary location, often as the result of a buffer overflow. 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: xfrm: esp: avoid in-place decrypt on shared skb frags MSG_SPLICE_PAGES can attach pages from a pipe directly to an skb. TCP marks such skbs with SKBFL_SHARED_FRAG after skb_splice_from_iter(), so later paths that may modify packet data can first make a private copy. The IPv4/IPv6 datagram append paths did not set this flag when splicing pages into UDP skbs. That leaves an ESP-in-UDP packet made from shared pipe pages looking like an ordinary uncloned nonlinear skb. ESP input then takes the no-COW fast path for uncloned skbs without a frag_list and decrypts in place over data that is not owned privately by the skb. Mark IPv4/IPv6 datagram splice frags with SKBFL_SHARED_FRAG, matching TCP. Also make ESP input fall back to skb_cow_data() when the flag is present, so ESP does not decrypt externally backed frags in place. Private nonlinear skb frags still use the existing fast path. This intentionally does not change ESP output. In esp_output_head(), the path that appends the ESP trailer to existing skb tailroom without calling skb_cow_data() is not reachable for nonlinear skbs: skb_tailroom() returns zero when skb->data_len is nonzero, while ESP tailen is positive. Thus ESP output will either use the separate destination-frag path or fall back to skb_cow_data().

References

NVD — CVE-2026-43284 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43284
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16061
access.redhat.com/errata/rhsa-2026:19... WEB
https://access.redhat.com/errata/RHSA-2026:19573
access.redhat.com/errata/rhsa-2026:19... WEB
https://access.redhat.com/errata/RHSA-2026:19574
access.redhat.com/errata/rhsa-2026:19... WEB
https://access.redhat.com/errata/RHSA-2026:19575
access.redhat.com/errata/rhsa-2026:19... WEB
https://access.redhat.com/errata/RHSA-2026:19577
access.redhat.com/errata/rhsa-2026:21... WEB
https://access.redhat.com/errata/RHSA-2026:21695
access.redhat.com/errata/rhsa-2026:23... WEB
https://access.redhat.com/errata/RHSA-2026:23233
access.redhat.com/errata/rhsa-2026:26... WEB
https://access.redhat.com/errata/RHSA-2026:26542
access.redhat.com/errata/rhsa-2026:33... WEB
https://access.redhat.com/errata/RHSA-2026:33486
access.redhat.com/errata/rhsa-2026:34... WEB
https://access.redhat.com/errata/RHSA-2026:34098
Software Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-43284
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2467771
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
git.kernel.org/stable/c/50ed1e7873... WEB
https://git.kernel.org/stable/c/50ed1e7873100f77abad20fd31c51029bc49cd03
git.kernel.org/stable/c/52646cbd00... WEB
https://git.kernel.org/stable/c/52646cbd00e765a6db9c3afe9535f26218276034
git.kernel.org/stable/c/5d55c7336f... WEB
https://git.kernel.org/stable/c/5d55c7336f8032d434adcc5fab987ccc93a44aec
git.kernel.org/stable/c/71a1d9d985... WEB
https://git.kernel.org/stable/c/71a1d9d985d26716f74d21f18ee8cac821b06e97
git.kernel.org/stable/c/8253aab465... WEB
https://git.kernel.org/stable/c/8253aab4659ca16116b522203c2a6b18dccacea7
git.kernel.org/stable/c/a6cb440f27... WEB
https://git.kernel.org/stable/c/a6cb440f274a22456ef3e86b457344f1678f38f9
git.kernel.org/stable/c/ab8b995323... WEB
https://git.kernel.org/stable/c/ab8b995323e5237041472d07e5055f5f7dcdf15b
git.kernel.org/stable/c/b54edf1e9a... WEB
https://git.kernel.org/stable/c/b54edf1e9a3fd3491bdcb82a21f8d21315271e0d
git.kernel.org/stable/c/f4c50a4034... WEB
https://git.kernel.org/stable/c/f4c50a4034e62ab75f1d5cdd191dd5f9c77fdff4
git.kernel.org/stable/c/fe785bb3a8... WEB
https://git.kernel.org/stable/c/fe785bb3a8096dffcc4048a85cd0c83337eeecad
Software Source Repository REPOSITORY
https://github.com/V4bel/dirtyfrag
Software Security Information SECURITY
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43284.json
www.vicarius.io/vsociety/posts/cve-... WEB
https://www.vicarius.io/vsociety/posts/cve-2026-43284-detection-script-dirty-frag-linux-kernel-local-privilege-escalation
www.vicarius.io/vsociety/posts/cve-... WEB
https://www.vicarius.io/vsociety/posts/cve-2026-43284-mitigation-script-dirty-frag-linux-kernel-local-privilege-escalation
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16062
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16100
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16155
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16157
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16160
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16161
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16171
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16176
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16180
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16195
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16196
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16201
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16202
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16203
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16204
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16206
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16254
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16312
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16314
access.redhat.com/errata/rhsa-2026:16... WEB
https://access.redhat.com/errata/RHSA-2026:16328
access.redhat.com/errata/rhsa-2026:17... WEB
https://access.redhat.com/errata/RHSA-2026:17795
access.redhat.com/errata/rhsa-2026:18... WEB
https://access.redhat.com/errata/RHSA-2026:18025
access.redhat.com/errata/rhsa-2026:19... WEB
https://access.redhat.com/errata/RHSA-2026:19074
access.redhat.com/errata/rhsa-2026:19... WEB
https://access.redhat.com/errata/RHSA-2026:19225
access.redhat.com/errata/rhsa-2026:19... WEB
https://access.redhat.com/errata/RHSA-2026:19564
access.redhat.com/errata/rhsa-2026:19... WEB
https://access.redhat.com/errata/RHSA-2026:19568
access.redhat.com/errata/rhsa-2026:19... WEB
https://access.redhat.com/errata/RHSA-2026:19569
access.redhat.com/errata/rhsa-2026:19... WEB
https://access.redhat.com/errata/RHSA-2026:19572
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/05/08/7
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/05/13/6
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/05/14/2
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/05/14/4

Frequently Asked Questions

What is CVE-2026-43284?
CVE-2026-43284 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-123: Write-what-where Condition.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-43284?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-43284?
CVE-2026-43284 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2026-43284?
CVE-2026-43284 is classified under CWE-123: Write-what-where Condition (Any condition where the attacker has the ability to write an arbitrary value to an arbitrary location, often as the result of a buffer overflow.).
How can I check Maven dependencies for CVE-2026-43284?
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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