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Debian: CVE-2022-48894: linux -- security update

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Debian: CVE-2022-48894: linux -- security update

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
08/22/2024
Created
08/23/2024
Added
08/22/2024
Modified
01/30/2025

Description

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.

Solution(s)

  • debian-upgrade-linux

References

  • https://attackerkb.com/topics/cve-2022-48894
  • CVE - 2022-48894
  • 查看数 698
  • 已创建
  • 最后回复

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