SB20240531304 - NULL pointer dereference in Linux kernel mt76 mt7915 driver
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531304
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2021-47540)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the mt7915_get_phy_mode() function in drivers/net/wireless/mediatek/mt76/mt7915/mcu.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/932b338f4e5c4cb0c2ed640da3bced1e63620198
- https://git.kernel.org/stable/c/14b03b8cebdf18ff13c39d58501b625411314de2
- https://git.kernel.org/stable/c/6e53d6d26920d5221d3f4d4f5ffdd629ea69aa5c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.84
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16