What’s Vulnerable › Vulnerabilities

CVE-2026-98194: wifi: libertas_tf: fix UAF in lbtf_free_adapter()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-19

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.

Affected products

• Linux kernel: 2.6.28 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

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

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