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CVE-2022-48894

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
21/08/2024
Last modified:
11/09/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> iommu/arm-smmu-v3: Don&amp;#39;t unregister on shutdown<br /> <br /> Similar to SMMUv2, this driver calls iommu_device_unregister() from the<br /> shutdown path, which removes the IOMMU groups with no coordination<br /> whatsoever with their users - shutdown methods are optional in device<br /> drivers. This can lead to NULL pointer dereferences in those drivers&amp;#39;<br /> DMA API calls, or worse.<br /> <br /> Instead of calling the full arm_smmu_device_remove() from<br /> arm_smmu_device_shutdown(), let&amp;#39;s pick only the relevant function call -<br /> arm_smmu_device_disable() - more or less the reverse of<br /> arm_smmu_device_reset() - and call just that from the shutdown path.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.1 (including) 6.1.7 (excluding)
cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools