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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 10.5%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
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
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 10.51% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- mit/kerberos 5 · debian/debian linux · netapp/active iq unified manager · netapp/oncommand insight · netapp/oncommand workflow automation · netapp/snapcenter · oracle/mysql server
- Source
- cve@mitre.org
EPSS 10.5% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- 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
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.