CVE-2026-31694: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-8fxx-fj7q-42m6
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CVSS 7.8
Published
Advisory Summary

CVE-2026-31694 is a HIGH (CVSS 7.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-31694 at a Glance

CVE Identifier CVE-2026-31694
GHSA Identifier GHSA-8fxx-fj7q-42m6
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification General Security Weakness
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-2026-31694

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-2026-31694, 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: fuse: reject oversized dirents in page cache fuse_add_dirent_to_cache() computes a serialized dirent size from the server-controlled namelen field and copies the dirent into a single page-cache page. The existing logic only checks whether the dirent fits in the remaining space of the current page and advances to a fresh page if not. It never checks whether the dirent itself exceeds PAGE_SIZE. As a result, a malicious FUSE server can return a dirent with namelen=4095, producing a serialized record size of 4120 bytes. On 4 KiB page systems this causes memcpy() to overflow the cache page by 24 bytes into the following kernel page. Reject dirents that cannot fit in a single page before copying them into the readdir cache.

References

NVD — CVE-2026-31694 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31694
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-784472.html
git.kernel.org/stable/c/038e61812f... WEB
https://git.kernel.org/stable/c/038e61812fa52ef62bad2cfc96bf37dc0db47c1e
git.kernel.org/stable/c/1d4a517fa9... WEB
https://git.kernel.org/stable/c/1d4a517fa90480c52fd452fea2686cd80f773ce2
git.kernel.org/stable/c/3059f9abe7... WEB
https://git.kernel.org/stable/c/3059f9abe7f1ba8fddf3c86c5faa1eeacf07e7d4
git.kernel.org/stable/c/45c05af363... WEB
https://git.kernel.org/stable/c/45c05af36311624c1148123caeb011312495d86b
git.kernel.org/stable/c/474ce83c96... WEB
https://git.kernel.org/stable/c/474ce83c96a55f2eeb14dee2be375eeadfdacdf5
git.kernel.org/stable/c/51a8de6c50... WEB
https://git.kernel.org/stable/c/51a8de6c50bf947c8f534cd73da4c8f0a13e7bed
git.kernel.org/stable/c/7de93abfaa... WEB
https://git.kernel.org/stable/c/7de93abfaae1b2dc94da8a07a36421bd073f1d8f
git.kernel.org/stable/c/d23ad78bfd... WEB
https://git.kernel.org/stable/c/d23ad78bfd205eac26766e38ba7d79f279131098

Frequently Asked Questions

What is CVE-2026-31694?
CVE-2026-31694 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-2026-31694?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-31694?
CVE-2026-31694 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-2026-31694?
CVE-2026-31694 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-31694?
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-8fxx-fj7q-42m6",
  "modified" : "2026-10-15T03:35:45Z",
  "published" : "2026-05-01T15:30:32Z",
  "aliases" : [ "CVE-2026-31694" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: reject oversized dirents in page cache\n\nfuse_add_dirent_to_cache() computes a serialized dirent size from the\nserver-controlled namelen field and copies the dirent into a single\npage-cache page. The existing logic only checks whether the dirent fits\nin the remaining space of the current page and advances to a fresh page\nif not. It never checks whether the dirent itself exceeds PAGE_SIZE.\n\nAs a result, a malicious FUSE server can return a dirent with\nnamelen=4095, producing a serialized record size of 4120 bytes. On 4 KiB\npage systems this causes memcpy() to overflow the cache page by 24 bytes\ninto the following kernel page.\n\nReject dirents that cannot fit in a single page before copying them into\nthe readdir cache.",
  "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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    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/038e61812fa52ef62bad2cfc96bf37dc0db47c1e"
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  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-01T14:16:19Z"
  }
}