GHSA-6692-8qqf-79jc: Duplicate Advisory `Read` On Uninitialized Buffer May Vulnerability

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Advisory Summary

GHSA-6692-8qqf-79jc is a HIGH `read` on uninitialized buffer may vulnerability (General Security Weakness) affecting Duplicate Advisory libraries in the crates.io ecosystem. The issue involves `read` on uninitialized buffer may cause ub ('tectonic_xdv' crate). Remediation is available by upgrading affected packages to version 0.1.12.

GHSA-6692-8qqf-79jc at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-6692-8qqf-79jc
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Duplicate Advisory
Package Ecosystem crates.io
Published Date
Last Updated

How to Fix GHSA-6692-8qqf-79jc

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

tectonic_xdv fixed: 0.1.12 
Upgrade tectonic_xdv to 0.1.12
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 tectonic_xdv

How to Check if You Are Affected

To determine whether your application is affected by GHSA-6692-8qqf-79jc, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for tectonic_xdv

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.1.12), 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 Duplicate Advisory, 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

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-qwvx-c8j7-5g75. This link is maintained to preserve external references. ## Original Description Affected versions of this crate passes an uninitialized buffer to a user-provided `Read` implementation. Arbitrary `Read` implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior. The problem was fixed in commit `cdff034` by zero-initializing the buffer before passing it to a user-provided `Read` implementation.

GHSA-6692-8qqf-79jc Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
0.1.12
Product / Package Ecosystem Affected Versions Fixed Version
tectonic_xdv
 crates.io
< 0.1.12
0.1.12

References

Duplicate Advisory Source Repository REPOSITORY
https://github.com/tectonic-typesetting/tectonic/issues/752
Security Fix Commit FIX COMMIT
https://github.com/tectonic-typesetting/tectonic/commit/cdff034e6d93cdfdafd13d8c6956e22fa5a57b79
Duplicate Advisory Source Repository REPOSITORY
https://github.com/tectonic-typesetting/tectonic
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2021-0112.html

Frequently Asked Questions

What is GHSA-6692-8qqf-79jc?
GHSA-6692-8qqf-79jc is a security vulnerability in Duplicate Advisory involving `Read` on uninitialized buffer may cause UB ('tectonic_xdv' crate) under General Security Weakness.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 0.1.12 across affected packages: tectonic_xdv.
What version fixes GHSA-6692-8qqf-79jc?
Upgrading to 0.1.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is tectonic_xdv affected?
Yes, tectonic_xdv is affected in releases prior to 0.1.12. Upgrade your dependency to 0.1.12 or later.
What CWE is associated with GHSA-6692-8qqf-79jc?
GHSA-6692-8qqf-79jc is classified under General Security Weakness.
How can I check crates.io dependencies for GHSA-6692-8qqf-79jc?
Run the dependency tree command: 'inspect dependencies for tectonic_xdv'. 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-6692-8qqf-79jc",
  "modified" : "2026-02-03T19:37:22Z",
  "published" : "2022-06-17T00:24:29Z",
  "withdrawn" : "2026-02-03T19:37:21Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: `Read` on uninitialized buffer may cause UB ('tectonic_xdv' crate)",
  "details" : "## Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-qwvx-c8j7-5g75. This link is maintained to preserve external references.\n\n## Original Description\nAffected versions of this crate passes an uninitialized buffer to a user-provided `Read` implementation.\n\nArbitrary `Read` implementations can read from the uninitialized buffer (memory exposure) and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory produces undefined values that can quickly invoke undefined behavior.\n\nThe problem was fixed in commit `cdff034` by zero-initializing the buffer before passing it to a user-provided `Read` implementation.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "tectonic_xdv"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.1.12"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/tectonic-typesetting/tectonic/issues/752"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/tectonic-typesetting/tectonic/commit/cdff034e6d93cdfdafd13d8c6956e22fa5a57b79"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/tectonic-typesetting/tectonic"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2021-0112.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-17T00:24:29Z",
    "nvd_published_at" : null
  }
}