wifi: libertas_tf: fix UAF in lbtf_free_adapter()

Summary

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.

Timeline

1. Oct 6, 2026, 8:44 AM UTCCVE published
2. Oct 19, 2026, 9:15 AM UTCRecord last updated

Affected versions

• Linux 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 Linux

  2.6.28

• KernelLinux

  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

References 8