Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c76c067e488ccd55734c3e750799caf2c5956db6 before 3be34fa1cdbf180c1a948cfededfdf2cdc497199; affected c76c067e488ccd55734c3e750799caf2c5956db6 before bd89d94f3ea6fdaee983cbc69226a00b9bde6d59; affected c76c067e488ccd55734c3e750799caf2c5956db6 before ecda483339a5151e3ca30d6b82691ef6f1d17912 |
| Linux / Linux | affected 6.7; unaffected 0 before 6.7; unaffected 6.11.11 through 6.11.*; unaffected 6.12.2 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/3be34fa1cdbf180c1a948cfededfdf2cdc497199
- https://git.kernel.org/stable/c/bd89d94f3ea6fdaee983cbc69226a00b9bde6d59
- https://git.kernel.org/stable/c/ecda483339a5151e3ca30d6b82691ef6f1d17912
ADP enrichment
No English description supplied.
No references supplied.