Use-after-free in Linux kernel mt76 mt7921 driver

1) Use-after-free

EUVDB-ID: #VU104483

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49129

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the mt7921_stop() function in drivers/net/wireless/mediatek/mt76/mt7921/main.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/38fbe806645090c07aa97171f20fc62c3d7d3a98
https://git.kernel.org/stable/c/827e7799c61b978fbc2cc9dac66cb62401b2b3f0
https://git.kernel.org/stable/c/ac1260b661c2ef0d0a56680cdb5672b931b7be8f
https://git.kernel.org/stable/c/c1a5e6002ec441a3b9fb4d048b4b49ae93409a46

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.