CVE-2016-6313: n/a vulnerability

CVE-2016-6313: The mixing functions in the random number generator in Libgcrypt before 1.5.6, 1.6.x before 1.6.6, and 1.7....

The mixing functions in the random number generator in Libgcrypt before 1.5.6, 1.6.x before 1.6.6, and 1.7.x before 1.7.3 and GnuPG before 1.4.21 make it easier for attackers to obtain the values of 160 bits by leveraging knowledge of the previous 4640 bits.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 01:29 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw affects the randomness used by Libgcrypt and older GnuPG. If an attacker can know a large amount of prior random output, the sources say it becomes easier to recover another 160 bits. That can weaken cryptographic operations, but the bundle does not show active exploitation or a CVSS score. Exposure is most likely on older Linux or Unix systems carrying vulnerable Libgcrypt or GnuPG packages. Debian, Gentoo, Ubuntu, and Red Hat advisories are cited. The source bundle does not identify specific applications beyond Libgcrypt and GnuPG. Treat this as a legacy cryptographic hygiene issue. Prioritize systems that generated or protected long-lived keys while running affected versions, especially servers, build systems, and signing environments. No active exploitation is shown in the provided sources. Mitigation focus: Inventory installed Libgcrypt and GnuPG package versions.; Upgrade Libgcrypt to fixed vendor packages or versions 1.5.6, 1.6.6, or 1.7.3 and later.; Upgrade GnuPG 1.4 deployments to 1.4.21 or vendor-fixed packages..

Prepared: Jun 13, 2026, 13:39 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 13, 2016, 20:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
GLSA-201612-01CVE reference · vendor-advisory, x_refsource_GENTOO
GLSA-201610-04CVE reference · vendor-advisory, x_refsource_GENTOO
[gnupg-announce] 20160817 [Announce] Security fixes for Libgcrypt and GnuPG 1.4 [CVE-2016-6316]CVE reference · mailing-list, x_refsource_MLIST
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=blob_plain%3Bf=NEWSCVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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