CVE-2024-53232

iommu/s390: Implement blocking domain

State: Published
Severity: 7.8 High
Published: Dec 27, 2024
Updated: Aug 5, 2026
Reserved: Nov 19, 2024

Description

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

iommu/s390: Implement blocking domain

This fixes a crash when surprise hot-unplugging a PCI device. This crash happens because during hot-unplug __iommu_group_set_domain_nofail() attaching the default domain fails when the platform no longer recognizes the device as it has already been removed and we end up with a NULL domain pointer and UAF. This is exactly the case referred to in the second comment in __iommu_device_set_domain() and just as stated there if we can instead attach the blocking domain the UAF is prevented as this can handle the already removed device. Implement the blocking domain to use this handling. With this change, the crash is fixed but we still hit a warning attempting to change DMA ownership on a blocked device.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
LinuxLinux	c76c067e488ccd55734c3e750799caf2c5956db6 to before 3be34fa1cdbf180c1a948cfededfdf2cdc497199Affected c76c067e488ccd55734c3e750799caf2c5956db6 to before bd89d94f3ea6fdaee983cbc69226a00b9bde6d59Affected c76c067e488ccd55734c3e750799caf2c5956db6 to before ecda483339a5151e3ca30d6b82691ef6f1d17912Affected
LinuxLinux	6.7Affected before 6.7Not affected 6.11.11 through 6.11.Not affected 6.12.2 through 6.12.Not affected 6.13 and laterNot affected

References

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