CVE-2021-36222

ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

11% chance of exploitation in the next 30 days; higher than 95% of CVEs (scores of 2026-10-25)

CWE

CWE-476

Published

2021-07-22

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• mit:kerberos_5
• netapp:active_iq_unified_manager
• netapp:oncommand_insight
• netapp:oncommand_workflow_automation
• netapp:snapcenter
• oracle:mysql_server

References

• https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562
• https://github.com/krb5/krb5/releases
• https://security.netapp.com/advisory/ntap-20211022-0003/
• https://security.netapp.com/advisory/ntap-20211104-0007/
• https://web.mit.edu/kerberos/advisories/

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