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CVE-2021-47347

kernel: wl1251: Fix possible buffer overflow in wl1251_cmd_scan

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 21, 2024

Updated · August 5, 2026

Description

A vulnerability was discovered in the Linux kernel's wl1251 wireless driver, where the wl1251_cmd_scan function used memcpy without checking if the data length was within safe limits. This could potentially lead to a buffer overflow, which might cause system instability or crashes.

Statement

This vulnerability is rated as a moderate severity because this issue can lead to a system crash or instability, it does not pose an immediate security risk or data compromise.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-122 · Heap-based Buffer Overflow