CVE-2026-74313
In the Linux kernel, the following vulnerability has been resolved: vduse: hold vduse_lock across IDR lookup in open path vduse_dev_open() looks up struct vduse_dev through the IDR and then acquires dev->lock only after vduse_lock has been dropped.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: vduse: hold vduse_lock across IDR lookup in open path vduse_dev_open() looks up struct vduse_dev through the IDR and then acquires dev->lock only after vduse_lock has been dropped. This leaves a window where a concurrent VDUSE_DESTROY_DEV can remove the same object from the IDR and free it before the open path locks the device, leading to a use-after-free. Close this race by keeping vduse_lock held until dev->lock has been acquired in the open path, matching the lock ordering already used by the destroy path.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/35483c5306e09b3190ff937089d404a78012695c
- https://git.kernel.org/stable/c/5c1560be8aa6849356455af67518d35c551cbd95
- https://git.kernel.org/stable/c/79e12c891940b0c4c75881b7fd82a8cbb8ac97be
- https://git.kernel.org/stable/c/93ed4692f2299a40346025979f40e4a9b7b33af7
- https://git.kernel.org/stable/c/a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2
- https://git.kernel.org/stable/c/d94e2947203aead590fd63f667d316d4475d65af
- https://git.kernel.org/stable/c/e440e077748939839d9f76e24383b76b785f80ce
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.