In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point operations are used in the MPI library.
結論預警: CVE-2017-9526 綜合評估為中等風險（53.7/100）：CVSS 技術影響為中級，利用機率（EPSS 2.32%） 核心證據: 近一日 EPSS 上升 +1.67%，被利用關注度持續升高。 強制指令: 梳理受影響資產並納入修補計畫。
風險隨態勢動態變化；本站持續評估並同步更新本頁展示內容。
EPSS 日更估計相對被利用可能性；百分位表示該 CVE 在已評分漏洞中的相對排名（越高表示相對更嚴重）。
| # | 日期 | 舊 EPSS 分數 | 新 EPSS 分數 | 變化（新 − 舊） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.65% | 2.32% | +1.67% |
| 2 | 2025-11-21 | 0.45% | 0.65% | +0.20% |
| 3 | 2025-11-18 | — | 0.45% | — |
完整 EPSS 歷史 （共 12 筆）
該 CVE 的 CVSS 指標。
| 底座分 | 版本 | 嚴重度 | 向量 | 可利用性 | 影響 | 分數來源 |
|---|---|---|---|---|---|---|
| 5.9 | 3.0 | MEDIUM |
|
2.2 | 3.6 | [email protected] |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2017-9526 not yet assigned priority: Debian including 1 source packages (libgcrypt20), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2017-9526 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2017-9526 |
suse
|
medium | CVE-2017-9526 severity moderate: SUSE including 22 source package names (0.9.1:libgcrypt20-1.6.1-16.39.1, 1.0.0:libgcrypt20-1.6.1-16.39.1, …), 63 product×package rows across 50 product lines (Container caasp/v4/default-http-backend, Container caasp/v4/dnsmasq-nanny, … (50 product lines)): Fixed 53, Known Not Affected 10. | https://www.suse.com/security/cve/CVE-2017-9526/ |
ubuntu
|
low | CVE-2017-9526 low priority: Ubuntu including 2 source packages (libgcrypt11, libgcrypt20), 18 status rows across 9 suites (artful, bionic, cosmic, disco, trusty, upstream, xenial, yakkety, zesty): DNE 8, not-affected 6, released 4. | https://ubuntu.com/security/CVE-2017-9526 |