CVE-2022-48916

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

iommu/vt-d: Fix double list_add when enabling VMD in scalable mode

When enabling VMD and IOMMU scalable mode, the following kernel panic

call trace/kernel log is shown in Eagle Stream platform (Sapphire Rapids

CPU) during booting:

pci 0000:59:00.5: Adding to iommu group 42

...

vmd 0000:59:00.5: PCI host bridge to bus 10000:80

pci 10000:80:01.0: [8086:352a] type 01 class 0x060400

pci 10000:80:01.0: reg 0x10: [mem 0x00000000-0x0001ffff 64bit]

pci 10000:80:01.0: enabling Extended Tags

pci 10000:80:01.0: PME# supported from D0 D3hot D3cold

pci 10000:80:01.0: DMAR: Setup RID2PASID failed

pci 10000:80:01.0: Failed to add to iommu group 42: -16

pci 10000:80:03.0: [8086:352b] type 01 class 0x060400

pci 10000:80:03.0: reg 0x10: [mem 0x00000000-0x0001ffff 64bit]

pci 10000:80:03.0: enabling Extended Tags

pci 10000:80:03.0: PME# supported from D0 D3hot D3cold

------------[ cut here ]------------

kernel BUG at lib/list_debug.c:2

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References