---
cve: "CVE-2026-80687"
severity: "LOW"
cvss: 3.1
epss: "5.8%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-28 08:16:54"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T04:55:34+02:00"
---

# CVE-2026-80687

> 3.1 LOW

## Beschreibung

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.

## Patch verfügbar (OSV)

- Kernel ≥ 6.18.44
- Kernel ≥ 7.1.8

## Referenzen

- <https://git.kernel.org/stable/c/294b464b2be7e57872864cb6936e1d9c7294f89d>
- <https://git.kernel.org/stable/c/ca9e49e1c8931a4e6e743a1f1d2e7f977f774b86>
- <https://git.kernel.org/stable/c/339bd11591593ab7ce88136ab7fd01ef3813b724>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80687) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_