The HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the underlying cryptographic hash algorithm is unkeyed, allowing a local attacker able to use the AF_ALG-based hash interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3 hash algorithm (CONFIG_CRYPTO_SHA3) to cause a kernel stack buffer overflow by executing a crafted sequence of system calls that encounter a missing SHA-3 initialization.
総合評価: CVE-2017-17806 は中リスク（46.3/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.56%、42 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 | 0.04% | 0.56% | +0.52% |
| 2 | 2025-03-30 | 0.14% | 0.04% | -0.10% |
| 3 | 2025-03-29 | — | 0.14% | — |
EPSS の全履歴 （全 6 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 |
|---|---|---|---|---|---|---|
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | [email protected] |
| 7.2 | 2.0 | HIGH |
|
3.9 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2017-17806 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2017-17806 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2017-17806 |
suse
|
low | CVE-2017-17806 severity low: SUSE including 237 source package names (cluster-md-kmp-default-4.12.14-120.1, cluster-md-kmp-default-4.4.103-6.38.1, …), 613 product×package rows across 98 product lines (SUSE CaaS Platform 4.0, SUSE CaaS Platform 4.5, … (98 product lines)): Fixed 343, Known Not Affected 270. | https://www.suse.com/security/cve/CVE-2017-17806/ |
ubuntu
|
medium | CVE-2017-17806 medium priority: Ubuntu including 97 source packages (linux, linux-aws, …), 863 status rows across 12 suites (artful, bionic, cosmic, focal, jammy, noble, oracular, plucky, trusty, upstream, xenial, zesty): DNE 588, not-affected 142, released 114, ignored 19. | https://ubuntu.com/security/CVE-2017-17806 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| linux | linux_kernel | < 3.2.97 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 3.3, < 3.16.52 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 3.17, < 3.18.89 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 3.19, < 4.1.49 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.2, < 4.4.107 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.5, < 4.9.71 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.10, < 4.14.8 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| opensuse | leap | 42.2 | cpe:2.3:o:opensuse:leap:42.2:*:*:*:*:*:*:* |
| opensuse_project | leap | 42.3 | cpe:2.3:o:opensuse_project:leap:42.3:*:*:*:*:*:*:* |
| suse | linux_enterprise_desktop | 12 | cpe:2.3:o:suse:linux_enterprise_desktop:12:sp2:*:*:*:*:*:* |
| suse | linux_enterprise_desktop | 12 | cpe:2.3:o:suse:linux_enterprise_desktop:12:sp3:*:*:*:*:*:* |
| suse | linux_enterprise_server | 11 | cpe:2.3:o:suse:linux_enterprise_server:11:extra:*:*:*:*:*:* |
| suse | linux_enterprise_server | 11 | cpe:2.3:o:suse:linux_enterprise_server:11:sp4:*:*:*:*:*:* |
| suse | linux_enterprise_server | 12 | cpe:2.3:o:suse:linux_enterprise_server:12:sp2:*:*:*:*:*:* |
| suse | linux_enterprise_server | 12 | cpe:2.3:o:suse:linux_enterprise_server:12:sp3:*:*:*:*:*:* |
| suse | linux_enterprise_server_for_raspberry_pi | 12 | cpe:2.3:o:suse:linux_enterprise_server_for_raspberry_pi:12:sp2:*:*:*:*:*:* |
| canonical | ubuntu_linux | 12.04 | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 17.10 | cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* |