CVE-2026-52953

HighCVSS 7.1

Published: 24/06/2026(UTC)Updated: 28/06/2026(UTC)Translated: 29/06/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.13%

3th percentile — higher than 3% of all known CVEs

Summary

In the Linux kernel, a bug in the iommu/vt-d driver causes a general protection fault (oops) when killing a QEMU process. The issue is due to out-of-scope memory access to the dmar_domain structure for a global static blocked domain, which is a dummy domain. The fix returns early in domain_remove_dev_pasid() for this domain.

Risk Assessment

This vulnerability can cause a kernel panic when shutting down QEMU virtual machines, potentially disrupting virtualized environments and leading to data loss or service unavailability.

Recommendation

Immediately update the Linux kernel to a version containing the fix (commit in Linus Torvalds' repository). Monitor distributions for the patch and apply it to production systems.

Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix oops due to out of scope access Below oops triggers when kill QEMU process: Oops: general protection fault, probably for non-canonical address 0x7fffffff844eaaa7: 0000 [#1] SMP NOPTI Call Trace: <TASK> do_raw_spin_lock+0xaa/0xc0 _raw_spin_lock_irqsave+0x21/0x40 domain_remove_dev_pasid+0x52/0x160 intel_nested_set_dev_pasid+0x1b9/0x1e0 __iommu_set_group_pasid+0x56/0x120 pci_dev_reset_iommu_done+0xe3/0x180 pcie_flr+0x65/0x160 __pci_reset_function_locked+0x5b/0x120 vfio_pci_core_close_device+0x63/0xe0 [vfio_pci_core] vfio_df_close+0x4f/0xa0 vfio_df_unbind_iommufd+0x2d/0x60 vfio_device_fops_release+0x3e/0x40 __fput+0xe5/0x2c0 task_work_run+0x58/0xa0 do_exit+0x2c8/0x600 do_group_exit+0x2f/0xa0 get_signal+0x863/0x8c0 arch_do_signal_or_restart+0x24/0x100 exit_to_user_mode_loop+0x87/0x380 do_syscall_64+0x2ff/0x11e0 entry_SYSCALL_64_after_hwframe+0x76/0x7e The global static blocked domain is a dummy domain without corresponding dmar_domain structure, accessing beyond iommu_domain structure triggers oops easily. Fix it by return early in domain_remove_dev_pasid() like identity domain.