SB20250226122 - Memory leak in Linux kernel realtek rtw89 driver

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2022-49539)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the ser_reset_vif() function in drivers/net/wireless/realtek/rtw89/ser.c, within the rtw89_cam_reset_key_iter(), rtw89_cam_init_addr_cam() and rtw89_cam_init_bssid_cam() functions in drivers/net/wireless/realtek/rtw89/cam.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/b169f877f001a474fb89939842c390518160bcc5
• https://git.kernel.org/stable/c/f6aff772c9978844529618d86aafb53e5d3ae161
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.3