CVE-2022-1623 Denial of service in libtiff

What is CVE-2022-1623?

CVE-2022-1623 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 11 May 2022. 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

LibTIFF master branch has an out-of-bounds read in LZWDecode in libtiff/tif_lzw.c:624, allowing attackers to cause a denial-of-service via a crafted tiff file. For users that compile libtiff from sources, the fix is available with commit b4e79bfa.

Weakness: CWE-125

Which versions are affected by CVE-2022-1623?

It affects 4 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Libtiff Libtiff, Netapp Ontap Select Deploy Administration Utility.

How do I fix CVE-2022-1623?

Apply the vendor's patch.

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-2022-1623 being exploited?

There is no known exploitation of CVE-2022-1623 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 AZL-9734, DEBIAN-CVE-2022-1623, GHSA-rc2g-jmfp-rfgf, JLSEC-2025-271.