A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
総合評価: CVE-2021-3697 は中リスク（40.4/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.43%、34 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
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 | 0.07% | 0.43% | +0.37% |
| 2 | 2025-03-30 | 0.17% | 0.07% | -0.11% |
| 3 | 2025-03-29 | — | 0.17% | — |
EPSS の全履歴 （全 8 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 |
|---|---|---|---|---|---|---|
| 7.0 | 3.1 | HIGH |
|
1.0 | 5.9 | [email protected] |
| 4.4 | 2.0 | MEDIUM |
|
3.4 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2021-3697: 1 source package rows (grub); 15 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 5. | https://security.alpinelinux.org/vuln/CVE-2021-3697 |
debian
|
not yet assigned | CVE-2021-3697 not yet assigned priority: Debian including 1 source packages (grub2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-3697 |
gentoo
|
high | CVE-2021-3697: 1 GLSA(s) (202209-12), 1 atom(s) (sys-boot/grub); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-3697 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-3697 |
suse
|
high | — | https://www.suse.com/security/cve/CVE-2021-3697/ |
ubuntu
|
medium | CVE-2021-3697 medium priority: Ubuntu including 3 source packages (grub2, grub2-signed, grub2-unsigned), 40 status rows across 14 suites (bionic, focal, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 24, released 6, ignored 3, needed 3, needs-triage 3, DNE 1. | https://ubuntu.com/security/CVE-2021-3697 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| gnu | grub2 | >= 2.00, < 2.12 | cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* |
| redhat | developer_tools | 1.0 | cpe:2.3:a:redhat:developer_tools:1.0:*:*:*:*:*:*:* |
| redhat | openshift | 3.0 | cpe:2.3:a:redhat:openshift:3.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.1 | cpe:2.3:o:redhat:enterprise_linux:8.1:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.4 | cpe:2.3:o:redhat:enterprise_linux:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 8.2 | cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 8.4 | cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 8.6 | cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_eus | 9.0 | cpe:2.3:o:redhat:enterprise_linux_eus:9.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian | 8.0 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian | 9.0 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian_eus | 8.2 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian_eus | 8.4 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian_eus | 8.6 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_for_power_little_endian_eus | 9.0 | cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 8.2 | cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 8.4 | cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 8.6 | cpe:2.3:o:redhat:enterprise_linux_server_aus:8.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.1 | cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.1:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.2 | cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.4 | cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.6 | cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.6:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 9.0 | cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 8.2 | cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 8.4 | cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_tus | 8.6 | cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:*:*:*:*:*:*:* |
| redhat | openshift_container_platform | 4.6 | cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:* |
| redhat | openshift_container_platform | 4.9 | cpe:2.3:a:redhat:openshift_container_platform:4.9:*:*:*:*:*:*:* |
| redhat | openshift_container_platform | 4.10 | cpe:2.3:a:redhat:openshift_container_platform:4.10:*:*:*:*:*:*:* |
| redhat | codeready_linux_builder | — | cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1991687 | Issue Tracking Third Party Advisory |
| https://security.gentoo.org/glsa/202209-12 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20220930-0001/ | Third Party Advisory |