CVE-2021-47480

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Last Modified: UTC

ModerateModerate ImpactWhat does this mean?

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Description

The CVE Program describes this issue as:

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Put LLD module refcnt after SCSI device is released SCSI host release is triggered when SCSI device is freed. We have to make sure that the low-level device driver module won't be unloaded before SCSI host instance is released because shost->hostt is required in the release handler. Make sure to put LLD module refcnt after SCSI device is released. Fixes a kernel panic of 'BUG: unable to handle page fault for address' reported by Changhui and Yi.

Additional information

  • Bugzilla 2282943: kernel: scsi: core: Put LLD module refcnt after SCSI device is released
  • CWE-416: Use After Free
  • FAQ: Frequently asked questions about CVE-2021-47480

Common Vulnerability Scoring System (CVSS) Score Details

Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 Score Breakdown
Red HatNVD

CVSS v3 Base Score

6

N/A

Attack Vector

Local

N/A

Attack Complexity

Low

N/A

Privileges Required

High

N/A

User Interaction

None

N/A

Scope

Unchanged

N/A

Confidentiality Impact

High

N/A

Integrity Impact

None

N/A

Availability Impact

High

N/A

CVSS v3 Vector

Red Hat: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

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