Use-after-free in Linux kernel intel igc driver

1) Use-after-free

EUVDB-ID: #VU90099

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-2021-47302

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 igc_clean_tx_ring() function in drivers/net/ethernet/intel/igc/igc_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

External links

http://git.kernel.org/stable/c/a9508e0edfe369ac95d0825bcdca976436ce780f
http://git.kernel.org/stable/c/e15f629036bac005fc758b4ad17896cf2312add4
http://git.kernel.org/stable/c/ea5e36b7367ea0a36ef73a163768f16d2977bd83
http://git.kernel.org/stable/c/56ea7ed103b46970e171eb1c95916f393d64eeff

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.