linux: In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3: Don't unregister on shutdown...
CVE-2022-48894 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48894, released August 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.
In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3: Don't unregister on shutdown Similar to SMMUv2, this driver calls iommu_device_unregister() from the shutdown path, which removes the IOMMU groups with no coordination whatsoever with their users - shutdown methods are optional in device drivers. This can lead to NULL pointer dereferences in those drivers' DMA API calls, or worse. Instead of calling the full arm_smmu_device_remove() from arm_smmu_device_shutdown(), let's pick only the relevant function call - arm_smmu_device_disable() - more or less the reverse of arm_smmu_device_reset() - and call just that from the shutdown path.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 6.1.7-1 | DEBIAN-CVE-2022-48894 | Aug 21, 2024 |
| linux · Debian 13.5 (trixie) | 6.1.7-1 | DEBIAN-CVE-2022-48894 | Aug 21, 2024 |
| linux · Debian 14 | 6.1.7-1 | DEBIAN-CVE-2022-48894 | Aug 21, 2024 |
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