Improper locking in Linux kernel realtek rtw88 driver

1) Improper locking

EUVDB-ID: #VU102165

Risk: Low

CVSSv4.0: 4.3 [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]

CVE-ID: CVE-2024-56609

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

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

The vulnerability exists due to improper locking within the rtw_usb_tx_handler() and rtw_usb_deinit_tx() functions in drivers/net/wireless/realtek/rtw88/usb.c, within the rtw_sdio_deinit_tx() function in drivers/net/wireless/realtek/rtw88/sdio.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12 - 6.12.4

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.12:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.4:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/3e5e4a801aaf4283390cc34959c6c48f910ca5ea
https://git.kernel.org/stable/c/9bca6528f20325d30c22236b23116f161d418f6d
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.5

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.