libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used.
総合評価: CVE-2017-7526 は中リスク（56.6/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 3.89%、89 パーセンタイル） 根拠: 直近 1 日で EPSS が +1.12% 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: 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 | 2.77% | 3.89% | +1.12% |
| 2 | 2026-05-24 | 2.57% | 2.77% | +0.20% |
| 3 | 2026-02-09 | — | 2.57% | — |
EPSS の全履歴 （全 40 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 |
|---|---|---|---|---|---|---|
| 6.1 | 3.0 | MEDIUM |
|
1.6 | 4.0 | [email protected] |
| 6.8 | 3.0 | MEDIUM |
|
2.2 | 4.0 | [email protected] |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2017-7526: 1 source package rows (gnupg1); 4 state rows across 4 repos (3.10-main, 3.11-main, 3.12-main, edge-community); fixed 4, open 0. | https://security.alpinelinux.org/vuln/CVE-2017-7526 |
debian
|
unimportant | CVE-2017-7526 unimportant priority: Debian including 3 source packages (gnupg1, gnupg2, libgcrypt20), 15 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 15. | https://security-tracker.debian.org/tracker/CVE-2017-7526 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2017-7526 |
suse
|
low | CVE-2017-7526 severity low: SUSE including 321 source package names (0.9.1:libgcrypt20-1.6.1-16.42.1, 1.0.0:libgcrypt20-1.6.1-16.42.1, …), 387 product×package rows across 80 product lines (Container caasp/v4/default-http-backend, Container caasp/v4/dnsmasq-nanny, … (80 product lines)): Fixed 230, Known Affected 157. | https://www.suse.com/security/cve/CVE-2017-7526/ |
ubuntu
|
medium | CVE-2017-7526 medium priority: Ubuntu including 4 source packages (gnupg, gnupg1, libgcrypt11, libgcrypt20), 30 status rows across 9 suites (artful, bionic, cosmic, disco, trusty, upstream, xenial, yakkety, zesty): DNE 13, not-affected 7, released 7, needs-triage 3. | https://ubuntu.com/security/CVE-2017-7526 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| gnupg | libgcrypt | < 1.7.8 | cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 12.04 | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* |
| 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:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://www.securityfocus.com/bid/99338 | Third Party Advisory VDB Entry |
| http://www.securitytracker.com/id/1038915 | Third Party Advisory VDB Entry |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526 | Issue Tracking Patch Third Party Advisory |
| https://eprint.iacr.org/2017/627 | Third Party Advisory |
| https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a | |
| https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=8725c99ffa41778f382ca97233183bcd687bb0ce | |
| https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=e6a3dc9900433bbc8ad362a595a3837318c28fa9 | |
| https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html | Mailing List Vendor Advisory |
| https://usn.ubuntu.com/3733-1/ | Third Party Advisory |
| https://usn.ubuntu.com/3733-2/ | Third Party Advisory |
| https://www.debian.org/security/2017/dsa-3901 | Third Party Advisory |
| https://www.debian.org/security/2017/dsa-3960 | Third Party Advisory |