CVE-2026-43088: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-5858-6g3v-6hmr
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CVSS 5.5
Published
Advisory Summary

CVE-2026-43088 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-43088 at a Glance

CVE Identifier CVE-2026-43088
GHSA Identifier GHSA-5858-6g3v-6hmr
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

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:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-43088

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-2026-43088, 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 General Security Weakness. 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: af_key: zero aligned sockaddr tail in PF_KEY exports PF_KEY export paths use `pfkey_sockaddr_size()` when reserving sockaddr payload space, so IPv6 addresses occupy 32 bytes on the wire. However, `pfkey_sockaddr_fill()` initializes only the first 28 bytes of `struct sockaddr_in6`, leaving the final 4 aligned bytes uninitialized. Not every PF_KEY message is affected. The state and policy dump builders already zero the whole message buffer before filling the sockaddr payloads. Keep the fix to the export paths that still append aligned sockaddr payloads with plain `skb_put()`: - `SADB_ACQUIRE` - `SADB_X_NAT_T_NEW_MAPPING` - `SADB_X_MIGRATE` Fix those paths by clearing only the aligned sockaddr tail after `pfkey_sockaddr_fill()`.

References

NVD — CVE-2026-43088 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43088
git.kernel.org/stable/c/11cbf294ba... WEB
https://git.kernel.org/stable/c/11cbf294bac623bd57296f231199193087f57b4a
git.kernel.org/stable/c/2e74f97435... WEB
https://git.kernel.org/stable/c/2e74f974359b5382ecbe8536abbb5b837eb6c724
git.kernel.org/stable/c/3c19cb8a84... WEB
https://git.kernel.org/stable/c/3c19cb8a84ef709d57943bd6664cf31cb91ba6ec
git.kernel.org/stable/c/426c355742... WEB
https://git.kernel.org/stable/c/426c355742f02cf743b347d9d7dbdc1bfbfa31ef
git.kernel.org/stable/c/6df5f90175... WEB
https://git.kernel.org/stable/c/6df5f90175fe4c584e9960b6c00131a7bf2b5399
git.kernel.org/stable/c/746ee79d9e... WEB
https://git.kernel.org/stable/c/746ee79d9e140f0e9e56f5123eaa88ad9332de7b
git.kernel.org/stable/c/e357c3cf8a... WEB
https://git.kernel.org/stable/c/e357c3cf8a44d4ec1f49ad6981e4ab9704354347
git.kernel.org/stable/c/edd446ee7c... WEB
https://git.kernel.org/stable/c/edd446ee7cd3d02cac246168063d5b3e9ea68460

Frequently Asked Questions

What is CVE-2026-43088?
CVE-2026-43088 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-43088?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-43088?
CVE-2026-43088 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-43088?
CVE-2026-43088 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-43088?
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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  "id" : "GHSA-5858-6g3v-6hmr",
  "modified" : "2026-09-14T12:31:28Z",
  "published" : "2026-05-06T12:30:27Z",
  "aliases" : [ "CVE-2026-43088" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: af_key: zero aligned sockaddr tail in PF_KEY exports\n\nPF_KEY export paths use `pfkey_sockaddr_size()` when reserving sockaddr\npayload space, so IPv6 addresses occupy 32 bytes on the wire. However,\n`pfkey_sockaddr_fill()` initializes only the first 28 bytes of\n`struct sockaddr_in6`, leaving the final 4 aligned bytes uninitialized.\n\nNot every PF_KEY message is affected. The state and policy dump builders\nalready zero the whole message buffer before filling the sockaddr\npayloads. Keep the fix to the export paths that still append aligned\nsockaddr payloads with plain `skb_put()`:\n\n  - `SADB_ACQUIRE`\n  - `SADB_X_NAT_T_NEW_MAPPING`\n  - `SADB_X_MIGRATE`\n\nFix those paths by clearing only the aligned sockaddr tail after\n`pfkey_sockaddr_fill()`.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
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  }, {
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    "url" : "https://git.kernel.org/stable/c/11cbf294bac623bd57296f231199193087f57b4a"
  }, {
    "type" : "WEB",
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  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-06T10:16:22Z"
  }
}