CVE-2026-43059

Status: UPDATED  |  Advisory ID: CVE-2026-43059

Key Details

Affected Products, Subsystems & Sectors

What to Know

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. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References