CVE-2026-80687
Unknown
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.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedAug 28, 2026
First seenAug 28, 2026
How to fix
Update
- Linux Linux294b464b2be7e57872864cb6936e1d9c7294f89d, ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86, 339bd11591593ab7ce88136ab7fd01ef3813b724 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | ed42eee797ff3dc889ade63c1dd7c4f430699e23 ≤ v < 294b464b2be7e57872864cb6936e1d9c7294f89d, ed42eee797ff3dc889ade63c1dd7c4f430699e23 ≤ v < ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86, ed42eee797ff3dc889ade63c1dd7c4f430699e23 ≤ v < 339bd11591593ab7ce88136ab7fd01ef3813b724, 6.17 | 294b464b2be7e57872864cb6936e1d9c7294f89d, ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86, 339bd11591593ab7ce88136ab7fd01ef3813b724 |
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