CVE-2021-32492 Memory corruption in djvulibre

What is CVE-2021-32492?

CVE-2021-32492 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 24 Jun 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A flaw was found in djvulibre-3.5.28 and earlier. An out of bounds read in function DJVU::DataPool::has_data() via crafted djvu file may lead to application crash and other consequences.

Weakness: CWE-125, CWE-119

Which versions are affected by CVE-2021-32492?

It affects 2 products.

Products include Debian Debian Linux, Djvulibre Project Djvulibre.

How do I fix CVE-2021-32492?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-32492 being exploited?

There is no known exploitation of CVE-2021-32492 in the wild and no public exploit code.

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2023-CR97144, DEBIAN-CVE-2021-32492, GHSA-hw2c-7w6f-7v7f, UBUNTU-CVE-2021-32492.