CVE-2022-48703

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Last Modified: UTC

ModerateModerate ImpactWhat does this mean?

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Description

A flaw was found in the Linux kernel in the `thermal/int340x_thermal` driver. This issue occurs when the Global Device Data Vault (GDDV) returns a zero-length buffer, causing the `kmemdup()` function to return a `ZERO_SIZE_PTR` (0x10), leading to a NULL pointer dereference in `data_vault_read()`, potentially causing a kernel crash. The issue has been fixed by adding checks for `ZERO_SIZE_PTR` or `NULL` using the `ZERO_OR_NULL_PTR()` macro.

A flaw was found in the Linux kernel in the thermal/int340x_thermal driver. This issue occurs when the Global Device Data Vault (GDDV) returns a zero-length buffer, causing the kmemdup() function to return a ZERO_SIZE_PTR (0x10), leading to a NULL pointer dereference in data_vault_read(), potentially causing a kernel crash. The issue has been fixed by adding checks for ZERO_SIZE_PTR or NULL using the ZERO_OR_NULL_PTR() macro.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Additional information

  • Bugzilla 2278960: kernel: thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR
  • FAQ: Frequently asked questions about CVE-2022-48703

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).

CVSS v3 Score Breakdown
Red HatNVD

CVSS v3 Base Score

5.5

N/A

Attack Vector

Local

N/A

Attack Complexity

Low

N/A

Privileges Required

Low

N/A

User Interaction

None

N/A

Scope

Unchanged

N/A

Confidentiality Impact

None

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:L/UI:N/S:U/C:N/I:N/A:H

Frequently Asked Questions

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