ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5…
Priority MEDIUM 46CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.
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 a return value is not properly managed in a certain situation.
Why it matters now
EPSS 0.10509 95th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* | before 1.18.4; 1.19.0 to before 1.19.2 | Vulnerable | moos-ivp |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* | 8.0.0 – 8.0.26 | Vulnerable | Oracle |
- cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* Versions before 1.18.4; 1.19.0 to before 1.19.2 Vulnerable ·moos-ivp
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* Versions 8.0.0 – 8.0.26 Vulnerable ·Oracle
Remediation
Red Hat 1 advisory
- RHSA-2021:3576 Released 2021-09-21 · Red Hat rating Moderatekrb5 security update
- Red Hat Enterprise Linux BaseOS (v. 8) krb5-1.18.2-8.3.el8_4, krb5-devel-1.18.2-8.3.el8_4, krb5-libs-1.18.2-8.3.el8_4 +5
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2021:3576 |
Not affected: 3 products
- Red Hat Enterprise Linux 9
- Red Hat JBoss Core Services
- Red Hat JBoss Enterprise Application Platform 6
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36222
- 2026-10-03 Alias added: GHSA-7gwg-3h62-pwf5
References
Patch 2
Advisory 4
Sources
- CVE-2021-36222 · CVE Program
- CVE-2021-36222 · NVD
- FIRST EPSS
- GHSA-7gwg-3h62-pwf5 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-36222 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences