Low 3.3Published Oct 21, 2024

CVE-2024-50044Bluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change

Updated under an hour ago (2026-10-19 07:10 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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

CVSS: 3.3 LOW (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 3241ad820dbb172021e0268b5611031991431626 before b77b3fb12fd483cae7c28648903b1d8a6b275f01; 3241ad820dbb172021e0268b5611031991431626 builds before 869c6ee62ab8f01bf2419e45326642be5c9b670a; from 3241ad820dbb172021e0268b5611031991431626 before ef44274dae9b0a90d1a97ce8b242a3b8243a7745; 3241ad820dbb172021e0268b5611031991431626 builds before 496b2ab0fd10f205e08909a125485fdc98843dbe; from 3241ad820dbb172021e0268b5611031991431626 before ced98072d3511b232ae1d3347945f35f30c0e303; 3241ad820dbb172021e0268b5611031991431626 builds before 38b2d5a57d125e1c17661b8308c0240c4a43b534; 3241ad820dbb172021e0268b5611031991431626 builds before 4cb9807c9b53bf1e5560420d26f319f528b50268; 3241ad820dbb172021e0268b5611031991431626 builds before 08d1914293dae38350b8088980e59fbc699a72fe	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	before V1.1.1	CISA ADP
linux linux_kernel linux:linux_kernel	from 2.6.27 before 5.10.227; from 5.11 before 5.15.168; from 5.16 before 6.1.113; from 6.2 before 6.6.57; from 6.7 before 6.11.4; 6.12; 6.12	NVD

References

https://git.kernel.org/stable/c/b77b3fb12fd483cae7c28648903b1d8a6b275f01
https://git.kernel.org/stable/c/869c6ee62ab8f01bf2419e45326642be5c9b670a
https://git.kernel.org/stable/c/ef44274dae9b0a90d1a97ce8b242a3b8243a7745patch
https://git.kernel.org/stable/c/496b2ab0fd10f205e08909a125485fdc98843dbepatch
https://git.kernel.org/stable/c/ced98072d3511b232ae1d3347945f35f30c0e303patch
https://git.kernel.org/stable/c/38b2d5a57d125e1c17661b8308c0240c4a43b534patch
https://git.kernel.org/stable/c/4cb9807c9b53bf1e5560420d26f319f528b50268patch
https://git.kernel.org/stable/c/08d1914293dae38350b8088980e59fbc699a72fepatch
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
https://cert-portal.siemens.com/productcert/html/ssa-355557.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.