CVE-2018-20622 Denial of service in n/a

What is CVE-2018-20622?

CVE-2018-20622 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 31 Dec 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

JasPer 2.0.14 has a memory leak in base/jas_malloc.c in libjasper.a when "--output-format jp2" is used.

Weakness: CWE-772

Which versions are affected by CVE-2018-20622?

It affects 2 products.

Products include Debian Debian Linux, Jasper Project Jasper.

How do I fix CVE-2018-20622?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-20622 being exploited?

There is no known exploitation of CVE-2018-20622 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• 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 GHSA-v9q8-5383-5fmx, UBUNTU-CVE-2018-20622.