CVE-2024-50044: Bluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change
First published: Mon Oct 21 2024(Updated: )
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
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=2.6.27<5.10.227 | |
| Linux Kernel | >=5.11<5.15.168 | |
| Linux Kernel | >=5.16<6.1.113 | |
| Linux Kernel | >=6.2<6.6.57 | |
| Linux Kernel | >=6.7<6.11.4 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/08d1914293dae38350b8088980e59fbc699a72fe
- https://git.kernel.org/stable/c/38b2d5a57d125e1c17661b8308c0240c4a43b534
- https://git.kernel.org/stable/c/496b2ab0fd10f205e08909a125485fdc98843dbe
- https://git.kernel.org/stable/c/4cb9807c9b53bf1e5560420d26f319f528b50268
- https://git.kernel.org/stable/c/869c6ee62ab8f01bf2419e45326642be5c9b670a
- https://git.kernel.org/stable/c/b77b3fb12fd483cae7c28648903b1d8a6b275f01
- https://git.kernel.org/stable/c/ced98072d3511b232ae1d3347945f35f30c0e303
- https://git.kernel.org/stable/c/ef44274dae9b0a90d1a97ce8b242a3b8243a7745
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50044
- https://nvd.nist.gov/vuln/detail/CVE-2024-50044
- https://launchpad.net/bugs/cve/CVE-2024-50044
- https://security-tracker.debian.org/tracker/CVE-2024-50044
- https://ubuntu.com/security/CVE-2024-50044
- https://git.kernel.org/linus/08d1914293dae38350b8088980e59fbc699a72fe
Frequently Asked Questions
What is the severity of CVE-2024-50044?
CVE-2024-50044 has not been explicitly assigned a severity rating, but it relates to a potential deadlock issue in the Bluetooth RFCOMM module of the Linux kernel.
How do I fix CVE-2024-50044?
To fix CVE-2024-50044, update the Linux kernel to versions that address the vulnerability, such as 5.10.227, 5.15.168, 6.1.113, or later.
What versions of the Linux kernel are affected by CVE-2024-50044?
CVE-2024-50044 affects multiple versions of the Linux kernel between 2.6.27 and 6.12-rc2, specifically those within certain version ranges.
What components are involved in CVE-2024-50044?
CVE-2024-50044 involves the rfcomm_sk_state_change function in the Bluetooth RFCOMM implementation of the Linux kernel.
Which distributions might be vulnerable to CVE-2024-50044?
Distributions running affected versions of the Linux kernel, such as Debian, may be vulnerable to CVE-2024-50044.
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