Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iommufd/viommu: Release the igroup lock on the vdevice_size error path iommufd_vdevice_alloc_ioctl() takes idev->igroup->lock, then validates the driver's vdevice_size against the core structure size with a WARN_ON_ONCE. On failure that guard jumps to out_put_idev, below out_unlock_igroup, so it skips the mutex_unlock(), leaving the igroup lock held and deadlocking the next vDEVICE operation on that group. Jump to out_unlock_igroup instead.
References
- https://git.kernel.org/stable/c/294b464b2be7e57872864cb6936e1d9c7294f89d
- https://git.kernel.org/stable/c/339bd11591593ab7ce88136ab7fd01ef3813b724
- https://git.kernel.org/stable/c/ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86
FAQ
What is CVE-2026-80687?
CVE-2026-80687 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: iommufd/viommu: Release the igroup lock on the vdevice_size error path iommufd_vdevice_alloc_ioctl() takes idev->igroup->lock, the...
How severe is CVE-2026-80687?
CVSS scoring is not yet available for CVE-2026-80687. Check NVD for updates.
Is there a patch for CVE-2026-80687?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.