CVE-2026-43340
In the Linux kernel, the following vulnerability has been resolved: comedi: Reinit dev->spinlock between attachments to low-level drivers `struct comedi_device` is the main controlling structure for a COMEDI device created by the COMEDI subsystem.
Does this matter?
Lower severity and a low EPSS score (0.11%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: comedi: Reinit dev->spinlock between attachments to low-level drivers `struct comedi_device` is the main controlling structure for a COMEDI device created by the COMEDI subsystem. It contains a member `spinlock` containing a spin-lock that is initialized by the COMEDI subsystem, but is reserved for use by a low-level driver attached to the COMEDI device (at least since commit 25436dc9d84f ("Staging: comedi: remove RT code")). Some COMEDI devices (those created on initialization of the COMEDI subsystem when the "comedi.comedi_num_legacy_minors" parameter is non-zero) can be attached to different low-level drivers over their lifetime using the `COMEDI_DEVCONFIG` ioctl command. This can result in inconsistent lock states being reported when there is a mismatch in the spin-lock locking levels used by each low-level driver to which the COMEDI device has been attached. Fix it by reinitializing `dev->spinlock` before calling the low-level driver's `attach` function pointer if `CONFIG_LOCKDEP` is enabled.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.11% probability · 2th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2b1f49e4fdff3ef0f8e9158bbb5b149e06287560Patch
- https://git.kernel.org/stable/c/3181c34b415c5464be9d34bff3e43ef63b747039Patch
- https://git.kernel.org/stable/c/430291d8f3884f57ae0057049b0ca291453e29e1Patch
- https://git.kernel.org/stable/c/4b9a9a6d71e3e252032f959fb3895a33acb5865cPatch
- https://git.kernel.org/stable/c/4d5ffe524903a30e2e0da7d16841a56bec2de55cPatch
- https://git.kernel.org/stable/c/83134a7a176ce5b4b19b6edecf4360e8d98d1a5aPatch
- https://git.kernel.org/stable/c/b89c026227712c367950bbae055a5b31073d3b30Patch
- https://git.kernel.org/stable/c/c01bcc67a9a692d65508ebd480405b5e77d562b7Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.