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.
総合評価: CVE-2021-36222 は高リスク（66.9/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 10.28%、95 パーセンタイル） 根拠: EPSS 上、短期間での悪用可能性は高い水準です。 直近 1 日で EPSS が +3.66% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 6.62% | 10.28% | +3.66% |
| 2 | 2026-04-12 | 9.23% | 6.62% | -2.61% |
| 3 | 2026-03-28 | — | 9.23% | — |
EPSS の全履歴 （全 33 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2021-36222: 1 source package rows (krb5); 8 state rows across 8 repos (3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 8, open 0. | https://security.alpinelinux.org/vuln/CVE-2021-36222 |
debian
|
not yet assigned | CVE-2021-36222 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-2021-36222 |
gentoo
|
normal | CVE-2021-36222: 1 GLSA(s) (202405-11), 1 atom(s) (app-crypt/mit-krb5); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-36222 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-36222 |
suse
|
high | CVE-2021-36222 severity important: SUSE including 674 source package names (0.1.0:krb5-1.16.3-3.21.1, 0.1.75:krb5-1.16.3-3.21.1, …), 1523 product×package rows across 219 product lines (Container bci/bci-init, Container bci/dotnet-aspnet, … (219 product lines)): Fixed 1227, Known Not Affected 154, Known Affected 142. | https://www.suse.com/security/cve/CVE-2021-36222/ |
ubuntu
|
medium | CVE-2021-36222 medium priority: Ubuntu including 1 source packages (krb5), 13 status rows across 13 suites (bionic, focal, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, trusty, upstream, xenial): not-affected 9, released 3, ignored 1. | https://ubuntu.com/security/CVE-2021-36222 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| mit | kerberos_5 | < 1.18.4 | cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* |
| mit | kerberos_5 | >= 1.19.0, < 1.19.2 | cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| netapp | active_iq_unified_manager | — | cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* |
| netapp | active_iq_unified_manager | — | cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* |
| netapp | oncommand_insight | — | cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* |
| netapp | oncommand_workflow_automation | — | cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* |
| netapp | snapcenter | — | cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* |
| oracle | mysql_server | >= 8.0.0, <= 8.0.26 | cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562 | Patch Third Party Advisory |
| https://github.com/krb5/krb5/releases | Release 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-4944 | Third Party Advisory |
| https://www.oracle.com/security-alerts/cpuoct2021.html | Patch Third Party Advisory |