CVE-2026-43059

01/Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers Commit 302a1f674c00 ("Bluetooth: MGMT: Fix possible UAFs") introduced mgmt_pending_valid(), which not only validates the pending command but also unlinks it from the pending list if it is valid. This change in semantics requires updates to several completion handlers to avoid list corruption and memory safety issues. This patch addresses two left-over issues from the aforementioned rework: 1. In mgmt_add_adv_patterns_monitor_complete(), mgmt_pending_remove() is replaced with mgmt_pending_free() in the success path. Since mgmt_pending_valid() already unlinks the command at the beginning of the function, calling mgmt_pending_remove() leads to a double list_del() and subsequent list corruption/kernel panic. 2. In set_mesh_complete(), the use of mgmt_pending_foreach() in the error path is removed. Since the current command is already unlinked by mgmt_pending_valid(), this foreach loop would incorrectly target other pending mesh commands, potentially freeing them while they are still being processed concurrently (leading to UAFs). The redundant mgmt_cmd_status() is also simplified to use cmd->opcode directly.

02/Affected products

linux: linux kernel

03/References5

• git.kernel.org/stable/c/02023ff760cc104a5d86a82ef5b8dd89098ad78d Patch
• git.kernel.org/stable/c/17f89341cb4281d1da0e2fb0de5406ab7c4e25ef Patch
• git.kernel.org/stable/c/695b45b2262fcb5e71bed1175aad59c72f92aa78 Patch
• git.kernel.org/stable/c/b5c5e96f3b0a5003c3ff98ebb33e59afec51dd77 Patch
• git.kernel.org/stable/c/3d6de8467236cd763ddc7d06127689bdfbfbd8ff