#VU94271 Improper locking in Linux kernel - CVE-2024-40977

Vulnerability identifier: #VU94271

Vulnerability 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-2024-40977

CWE-ID: CWE-667

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to improper locking within the mt76s_tx_status_data() function in drivers/net/wireless/mediatek/mt76/sdio.c, within the mt7921s_mac_reset() function in drivers/net/wireless/mediatek/mt76/mt7921/sdio_mac.c, within the mt7921e_mac_reset() function in drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c, within the mt7921_mac_reset_work() function in drivers/net/wireless/mediatek/mt76/mt7921/mac.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/0b81faa05b0b9feb3ae2d69be1d21f0d126ecb08
https://git.kernel.org/stable/c/85edd783f4539a994d66c4c014d5858f490b7a02
https://git.kernel.org/stable/c/e974dd4c22a23ec3ce579fb6d31a674ac0435da9
https://git.kernel.org/stable/c/ecf0b2b8a37c8464186620bef37812a117ff6366

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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.