CVE-2026-80687 is a vulnerability in Linux Kernel
Published on August 28, 2026
iommufd/viommu: Release the igroup lock on the vdevice_size error path
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.
Products Associated with CVE-2026-80687
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Affected Versions
Linux:- Version ed42eee797ff3dc889ade63c1dd7c4f430699e23 and below 294b464b2be7e57872864cb6936e1d9c7294f89d is affected.
- Version ed42eee797ff3dc889ade63c1dd7c4f430699e23 and below ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86 is affected.
- Version ed42eee797ff3dc889ade63c1dd7c4f430699e23 and below 339bd11591593ab7ce88136ab7fd01ef3813b724 is affected.
- Version 6.17 is affected.
- Before 6.17 is unaffected.
- Version 6.18.44, <= 6.18.* is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.