01 Record

CVE-2017-9526

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

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

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02 Description

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

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 2.33% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 83.3% of scored records. A rank, not a probability.
NVD base score: 5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2017-06-11 02:00Z9 YR AGO

Last updated

2024-08-05 17:11Z2 YR AGO

Reserved

2017-06-10

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
CWE-385Covert Timing ChannelBase

Data version

5.1

Document digest

dc2e2ab815246d2482239441f9a69c0d25c9c550564f5381f488f5a9e720c6ce

05 Affected products

VendorProductVersionsPlatforms

gnupglibgcryptNot specified—

redhatenterprise_linuxNot specified—

06 References

www.oracle.comhttp://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.htmlx_refsource_CONFIRM
www.oracle.comhttps://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlx_refsource_CONFIRM
git.gnupg.orghttps://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=5a22de904a0a366ae79f03ff1e13a1232a89e26bx_refsource_CONFIRM
www.debian.orgDSA-3880http://www.debian.org/security/2017/dsa-3880vendor-advisoryx_refsource_DEBIAN
www.securityfocus.com99046http://www.securityfocus.com/bid/99046vdb-entryx_refsource_BID
git.gnupg.orghttps://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=f9494b3f258e01b6af8bd3941ce436bcc00afc56x_refsource_CONFIRM
bugzilla.suse.comhttps://bugzilla.suse.com/show_bug.cgi?id=1042326x_refsource_CONFIRM

07 Fixed in

Debian 12

libgcrypt20
Fixed in 1.7.6-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

libgcrypt20
Fixed in 1.7.6-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

libgcrypt20
Fixed in 1.7.6-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

libgcrypt20
Fixed in 1.6.5-2ubuntu0.3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.