{"id":"CVE-2021-36222","title":"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","summary":"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 …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"mit","product":"kerberos_5","affected":["kerberos_5 < 1.18.4","kerberos_5 >= 1.19.0, < 1.19.2","debian_linux = 10.0","active_iq_unified_manager","oncommand_insight","oncommand_workflow_automation","snapcenter","mysql_server >= 8.0.0, <= 8.0.26"],"patched":["kerberos_5 1.19.2"],"published":"2021-07-22","updated":"2026-10-14","sourceUpdated":"2026-10-14T12:17:14.713","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-36222","references":[{"url":"https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562","label":"cve@mitre.org"},{"url":"https://github.com/krb5/krb5/releases","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20211022-0003/","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20211104-0007/","label":"cve@mitre.org"},{"url":"https://web.mit.edu/kerberos/advisories/","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2021/dsa-4944","label":"cve@mitre.org"},{"url":"https://www.oracle.com/security-alerts/cpuoct2021.html","label":"cve@mitre.org"},{"url":"https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/krb5/krb5/releases","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20211022-0003/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20211104-0007/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://web.mit.edu/kerberos/advisories/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2021/dsa-4944","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpuoct2021.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.10276,"epssPercentile":0.95609,"ingestedAt":"2026-10-14T12:29:10.823Z","slug":"CVE-2021-36222","body":"## Overview\n\nec_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.\n\n## Affected\n\n- `kerberos_5 < 1.18.4`\n- `kerberos_5 >= 1.19.0, < 1.19.2`\n- `debian_linux = 10.0`\n- `active_iq_unified_manager`\n- `oncommand_insight`\n- `oncommand_workflow_automation`\n- `snapcenter`\n- `mysql_server >= 8.0.0, <= 8.0.26`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `kerberos_5 1.19.2`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":41.3,"likelihood":2.1,"exploitation":0,"ransomware":0},"changes":[]}