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CVE-2024-49951: Bluetooth: MGMT: Fix possible crash on mgmt_index_removed

• Severity: medium (CVSS 5.5 v3.1)
• 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: 2024-10-21 · updated 2026-08-04

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix possible crash on mgmt_index_removed If mgmt_index_removed is called while there are commands queued on cmd_sync it could lead to crashes like the bellow trace: 0x0000053D: __list_del_entry_valid_or_report+0x98/0xdc 0x0000053D: mgmt_pending_remove+0x18/0x58 [bluetooth] 0x0000053E: mgmt_remove_adv_monitor_complete+0x80/0x108 [bluetooth] 0x0000053E: hci_cmd_sync_work+0xbc/0x164 [bluetooth] So while handling mgmt_index_removed this attempts to dequeue commands passed as user_data to cmd_sync.

Affected products

• Linux kernel: from 6.0 before 6.6.55; from 6.7 before 6.10.14; from 6.11 before 6.11.3; 6.12-rc1 — fixed in 6.10.14, 6.11.3, 6.6.55

How to fix

Upgrade to a fixed version: Linux kernel 6.10.14, 6.11.3, 6.6.55. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0cc47233af35fb5f10b5e6a027cb4ccd480caf9a
• https://git.kernel.org/stable/c/19b40ca62607cef78369549d1af091f2fd558931
• https://git.kernel.org/stable/c/4883296505aa7e4863c6869b689afb6005633b23
• https://git.kernel.org/stable/c/8c3f7943a29145d8a2d8e24893762f7673323eae
• https://git.kernel.org/stable/c/f53e1c9c726d83092167f2226f32bd3b73f26c21
• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

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