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.

• CWE-476

• https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562Patch, Third Party Advisory
• https://github.com/krb5/krb5/releasesRelease Notes, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211022-0003/Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211104-0007/Third Party Advisory
• https://web.mit.edu/kerberos/advisories/Not Applicable
• https://www.debian.org/security/2021/dsa-4944Third Party Advisory
• https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
• https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562Patch, Third Party Advisory
• https://github.com/krb5/krb5/releasesRelease Notes, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211022-0003/Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211104-0007/Third Party Advisory
• https://web.mit.edu/kerberos/advisories/Not Applicable
• https://www.debian.org/security/2021/dsa-4944Third Party Advisory
• https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory

Published

Jul 22, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-36216LINE for Windows 6.2.1.2289 and before allows arbitrary code…7.8
• CVE-2021-36217Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2021-36218An issue was discovered in SKALE sgxwallet 1.58.3. sgx_disp_…7.5
• CVE-2021-36219An issue was discovered in SKALE sgxwallet 1.58.3. The provi…9.8
• CVE-2021-3622A flaw was found in the hivex library. This flaw allows an a…4.3
• CVE-2021-36221Go before 1.15.15 and 1.16.x before 1.16.7 has a race condit…5.9
• CVE-2021-36224Western Digital My Cloud devices before OS5 have a nobody ac…9.8
• CVE-2021-36225Western Digital My Cloud devices before OS5 allow REST API a…8.8
• CVE-2021-36226Western Digital My Cloud devices before OS5 do not use crypt…9.8
• CVE-2021-3623A flaw was found in libtpms. The flaw can be triggered by sp…6.1
• CVE-2021-36230HashiCorp Terraform Enterprise releases up to v202106-1 did …8.8
• CVE-2021-36231Deserialization of untrusted data in multiple functions in M…8.8