CVE-2026-43059

ANALYSIS PENDING

Bluetooth: MGMT: Fix list corruption and UAF in command complete handlers

Title source: cna
STIX 2.1

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.

Scores

EPSS 0.0002
EPSS Percentile 6.8%

Details

Status published
Products (15)
Linux/Linux < 6.17
Linux/Linux 0b60eb04b8524e1b4b3f07fea0d16fda9a677d9a
Linux/Linux 302a1f674c00dd5581ab8e493ef44767c5101aab - 02023ff760cc104a5d86a82ef5b8dd89098ad78d
Linux/Linux 302a1f674c00dd5581ab8e493ef44767c5101aab - 17f89341cb4281d1da0e2fb0de5406ab7c4e25ef
Linux/Linux 302a1f674c00dd5581ab8e493ef44767c5101aab - b5c5e96f3b0a5003c3ff98ebb33e59afec51dd77
Linux/Linux 6.12.59 - 6.12.78
Linux/Linux 6.12.78 - 6.12.*
Linux/Linux 6.16.10 - 6.17
Linux/Linux 6.17
Linux/Linux 6.18.20 - 6.18.*
... and 5 more
Published May 05, 2026
Tracked Since May 05, 2026