CVE-2019-12098 Security feature bypass in n/a

What is CVE-2019-12098?

CVE-2019-12098 is a high-severity vulnerability in Debian Debian Linux, published on 15 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the client side of Heimdal before 7.6.0, failure to verify anonymous PKINIT PA-PKINIT-KX key exchange permits a man-in-the-middle attack. This issue is in krb5_init_creds_step in lib/krb5/init_creds_pw.c.

Weakness: CWE-295

Which versions are affected by CVE-2019-12098?

It affects 5 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Heimdal Project Heimdal, Opensuse Backports Sle, Opensuse Leap.

How do I fix CVE-2019-12098?

Upgrade to a fixed version.

Is CVE-2019-12098 being exploited?

There is no known exploitation of CVE-2019-12098 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-2019-12098, DEBIAN-CVE-2019-12098, GHSA-pfc3-2w85-9453, UBUNTU-CVE-2019-12098.