The kdc_handle_protected_negotiation function in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and 1.10.x before 1.10.3 attempts to calculate a checksum before verifying that the key type is appropriate for a checksum, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized pointer free, heap memory corruption, and daemon crash) via a crafted AS-REQ request.
Conclusion & alert: CVE-2012-1015 is rated High Risk (72.6/100): CVSS Critical severity, with high exploitation likelihood (EPSS 4.81%, 91th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +3.58% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 1.23% | 4.81% | +3.58% |
| 2 | 2025-11-09 | 3.10% | 1.23% | -1.87% |
| 3 | 2025-03-30 | — | 3.10% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2012-1015 not yet assigned priority: Debian including 1 source packages (krb5), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2012-1015 |
gentoo
|
normal | CVE-2012-1015: 1 GLSA(s) (201312-12), 1 atom(s) (app-crypt/mit-krb5); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-1015 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2012-1015 |
suse
|
high | CVE-2012-1015 severity important: SUSE including 24 source package names (krb5, krb5-1.8.6-133.49.121.2, …), 295 product×package rows across 50 product lines (Magnum Orchestration 7, SUSE CaaS Platform 4.0, … (50 product lines)): Known Not Affected 273, Fixed 22. | https://www.suse.com/security/cve/CVE-2012-1015/ |
ubuntu
|
medium | CVE-2012-1015 medium priority: Ubuntu including 1 source packages (krb5), 6 status rows across 6 suites (hardy, lucid, natty, oneiric, precise, upstream): released 4, needs-triage 1, not-affected 1. | https://ubuntu.com/security/CVE-2012-1015 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| mit | kerberos_5 | 1.8 | cpe:2.3:a:mit:kerberos_5:1.8:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.8.1 | cpe:2.3:a:mit:kerberos_5:1.8.1:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.8.2 | cpe:2.3:a:mit:kerberos_5:1.8.2:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.8.3 | cpe:2.3:a:mit:kerberos_5:1.8.3:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.8.4 | cpe:2.3:a:mit:kerberos_5:1.8.4:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.8.5 | cpe:2.3:a:mit:kerberos_5:1.8.5:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.8.6 | cpe:2.3:a:mit:kerberos_5:1.8.6:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.9.4 | cpe:2.3:a:mit:kerberos_5:1.9.4:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.10 | cpe:2.3:a:mit:kerberos_5:1.10:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.10.1 | cpe:2.3:a:mit:kerberos_5:1.10.1:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.10.2 | cpe:2.3:a:mit:kerberos_5:1.10.2:*:*:*:*:*:*:* |