Use-after-free in Linux kernel ath ath10k driver

1) Use-after-free

EUVDB-ID: #VU91067

Risk: Low

CVSSv3.1: 7.7 [AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47017

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 ath10k_htc_send_bundle() function in drivers/net/wireless/ath/ath10k/htc.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65
http://git.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71b
http://git.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676
http://git.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3

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.