GHSA-p93v-m2r2-4387: Github.com/google/fscrypt Denial of Service Vulnerability

MODERATE
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Advisory Summary

GHSA-p93v-m2r2-4387 is a MODERATE denial of service vulnerability (General Security Weakness) affecting Github.com/google/fscrypt libraries in the Go ecosystem. The issue involves denial of service via insufficient metadata validation. Remediation is available by upgrading affected packages to version 0.3.3.

GHSA-p93v-m2r2-4387 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-p93v-m2r2-4387
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Github.com/google/fscrypt
Package Ecosystem Go
Published Date
Last Updated

How to Fix GHSA-p93v-m2r2-4387

To remediate this vulnerability, upgrade all affected Github.com/google/fscrypt dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/google/fscrypt fixed: 0.3.3 
Upgrade github.com/google/fscrypt to 0.3.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/google/fscrypt

How to Check if You Are Affected

To determine whether your application is affected by GHSA-p93v-m2r2-4387, inspect your project dependencies for Github.com/google/fscrypt:

inspect dependencies for github.com/google/fscrypt

Analyze the terminal output to locate any version of Github.com/google/fscrypt in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.3.3), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Github.com/google/fscrypt, 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

The PAM module for `fscrypt` through v0.3.2 doesn't adequately validate `fscrypt` metadata files, allowing users to create malicious metadata files that prevent other users from logging in. A local user can cause a denial of service by creating a `fscrypt` metadata file that prevents other users from logging into the system. We recommend upgrading to v0.3.3 or above. For more details, see [CVE-2022-25327](https://www.cve.org/CVERecord?id=CVE-2022-25327).

GHSA-p93v-m2r2-4387 Affected Github.com/google/fscrypt Versions

1 component(s)
Fixed Versions:
0.3.3
Product / Package Ecosystem Affected Versions Fixed Version
github.com/google/fscrypt
golang/github.com/google/fscrypt
Go
< 0.3.3
0.3.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/google/fscrypt/security/advisories/GHSA-p93v-m2r2-4387
Security Fix Commit FIX COMMIT
https://github.com/google/fscrypt/commit/91aa3ebf42032ca783c41f9ec25d885875f66ddb
pkg.go.dev/vuln/go-2022-0340 WEB
https://pkg.go.dev/vuln/GO-2022-0340
github.com/google/fs... PACKAGE
github.com/google/fscrypt

Frequently Asked Questions

What is GHSA-p93v-m2r2-4387?
GHSA-p93v-m2r2-4387 is a security vulnerability in Github.com/google/fscrypt involving Denial of service via insufficient metadata validation under General Security Weakness.
Which Github.com/google/fscrypt versions are affected?
Affected versions include releases prior to 0.3.3 across affected packages: github.com/google/fscrypt.
What version fixes GHSA-p93v-m2r2-4387?
Upgrading to 0.3.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/google/fscrypt affected?
Yes, github.com/google/fscrypt is affected in releases prior to 0.3.3. Upgrade your dependency to 0.3.3 or later.
What CWE is associated with GHSA-p93v-m2r2-4387?
GHSA-p93v-m2r2-4387 is classified under General Security Weakness.
How can I check Go dependencies for GHSA-p93v-m2r2-4387?
Run the dependency tree command: 'inspect dependencies for github.com/google/fscrypt'. 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-p93v-m2r2-4387",
  "modified" : "2026-06-08T16:00:33Z",
  "published" : "2022-03-01T21:05:01Z",
  "aliases" : [ ],
  "summary" : "Denial of service via insufficient metadata validation",
  "details" : "The PAM module for `fscrypt` through v0.3.2 doesn't adequately validate `fscrypt` metadata files, allowing users to create malicious metadata files that prevent other users from logging in. A local user can cause a denial of service by creating a `fscrypt` metadata file that prevents other users from logging into the system. We recommend upgrading to v0.3.3 or above.\n\nFor more details, see [CVE-2022-25327](https://www.cve.org/CVERecord?id=CVE-2022-25327).",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/google/fscrypt"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.3.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/google/fscrypt/security/advisories/GHSA-p93v-m2r2-4387"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/google/fscrypt/commit/91aa3ebf42032ca783c41f9ec25d885875f66ddb"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2022-0340"
  }, {
    "type" : "PACKAGE",
    "url" : "github.com/google/fscrypt"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-03-01T21:05:01Z",
    "nvd_published_at" : null
  }
}