CVE-2022-41916 Read one byte past a buffer when normalizing Unicode

What is CVE-2022-41916?

CVE-2022-41916 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 15 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Heimdal is an implementation of ASN.1/DER, PKIX, and Kerberos. Versions prior to 7.7.1 are vulnerable to a denial of service vulnerability in Heimdal's PKI certificate validation library, affecting the KDC (via PKINIT) and kinit (via PKINIT), as well as any third-party applications using Heimdal's libhx509. Users should upgrade to Heimdal 7.7.1 or 7.8. There are no known workarounds for this issue.

Weakness: CWE-193

Which versions are affected by CVE-2022-41916?

It affects 2 products.

Products include Debian Debian Linux, Heimdal Project Heimdal.

How do I fix CVE-2022-41916?

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-2022-41916 being exploited?

There is no known exploitation of CVE-2022-41916 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 ALPINE-CVE-2022-41916, AZL-11457, AZL-44835, CLEANSTART-2024-TH83400, DEBIAN-CVE-2022-41916, GHSA-mgqr-gvh6-23cx and 2 more.