CVE-2024-50044

Bluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change

LOW

3.3

CVSS Score

Published: October 21, 2024 at 07:39 PM UTC

Updated: October 15, 2026 at 01:19 AM UTC

2 products affected across 2 vendorsLinux KernelSIMATIC S7-1500 TM MFP

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Severity

LOW3.3

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change rfcomm_sk_state_change attempts to use sock_lock so it must never be called with it locked but rfcomm_sock_ioctl always attempt to lock it causing the following trace: ====================================================== WARNING: possible circular locking dependency detected 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted ------------------------------------------------------ syz-executor386/5093 is trying to acquire lock: ffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1671 [inline] ffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: rfcomm_sk_state_change+0x5b/0x310 net/bluetooth/rfcomm/sock.c:73 but task is already holding lock: ffff88807badfd28 (&d->lock){+.+.}-{3:3}, at: __rfcomm_dlc_close+0x226/0x6a0 net/bluetooth/rfcomm/core.c:491

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.27 ≤ v < 5.10.2275.11 ≤ v < 5.15.1685.16 ≤ v < 6.1.1136.2 ≤ v < 6.6.576.7 ≤ v < 6.11.43241ad820dbb172021e0268b56110319914316266.12 6.12 rc1 6.12 rc2

Vendor states this is fixed in 08d1914293dae38350b8088980e59fbc699a72fe (fixed)

Vendor states this is fixed in 38b2d5a57d125e1c17661b8308c0240c4a43b534 (fixed)

Vendor states this is fixed in 496b2ab0fd10f205e08909a125485fdc98843dbe (fixed)

Vendor states this is fixed in 4cb9807c9b53bf1e5560420d26f319f528b50268 (fixed)

Vendor states this is fixed in 869c6ee62ab8f01bf2419e45326642be5c9b670a (fixed)

Vendor states this is fixed in b77b3fb12fd483cae7c28648903b1d8a6b275f01 (fixed)

Vendor states this is fixed in ced98072d3511b232ae1d3347945f35f30c0e303 (fixed)

Vendor states this is fixed in ef44274dae9b0a90d1a97ce8b242a3b8243a7745 (fixed)

Vendor states this is fixed in 2.6.27 (unaffected)

Vendor states this is fixed in 4.19.323 (unaffected)

Vendor states this is fixed in 5.10.227 (unaffected)

Vendor states this is fixed in 5.15.168 (unaffected)