CVE-2026-80687iommufd/viommu: Release the igroup lock on the vdevice_size error path
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ed42eee797ff3dc889ade63c1dd7c4f430699e23 before 294b464b2be7e57872864cb6936e1d9c7294f89d; from ed42eee797ff3dc889ade63c1dd7c4f430699e23 before ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86; from ed42eee797ff3dc889ade63c1dd7c4f430699e23 before 339bd11591593ab7ce88136ab7fd01ef3813b724 | CNA record |
References
- https://git.kernel.org/stable/c/294b464b2be7e57872864cb6936e1d9c7294f89d
- https://git.kernel.org/stable/c/ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86
- https://git.kernel.org/stable/c/339bd11591593ab7ce88136ab7fd01ef3813b724
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.