CVE-2022-50712 devlink: hold region lock when flushing snapshots
A race condition in the Linux kernel devlink subsystem can cause a kernel warning and potential denial of service during device reload.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-50712?
CVE-2022-50712 is a vulnerability in Linux, published on 24 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
devlink: hold region lock when flushing snapshots
Netdevsim triggers a splat on reload, when it destroys regions with snapshots pending:
WARNING: CPU: 1 PID: 787 at net/core/devlink.c:6291 devlink_region_snapshot_del+0x12e/0x140 CPU: 1 PID: 787 Comm: devlink Not tainted 6.1.0-07460-g7ae9888d6e1c #580 RIP: 0010:devlink_region_snapshot_del+0x12e/0x140 Call Trace: <TASK> devl_region_destroy+0x70/0x140 nsim_dev_reload_down+0x2f/0x60 [netdevsim] devlink_reload+0x1f7/0x360 devlink_nl_cmd_reload+0x6ce/0x860 genl_family_rcv_msg_doit.isra.0+0x145/0x1c0
This is the locking assert in devlink_region_snapshot_del(), we're supposed to be holding the region->snapshot_lock here.
Which versions are affected by CVE-2022-50712?
How do I fix CVE-2022-50712?
Apply the vendor's patch.
Is CVE-2022-50712 being exploited?
There is no known exploitation of CVE-2022-50712 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50712, GHSA-ffp9-5f99-52w2, UBUNTU-CVE-2022-50712.