Vulnerability identifier: #VU90136

Vulnerability 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-2021-47372

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the macb_remove() function in drivers/net/ethernet/cadence/macb_pci.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

---

External links
http://git.kernel.org/stable/c/a7d521cc726f30b8e679a6f36d04b18a8ab3c536
http://git.kernel.org/stable/c/46670fb832ee80943715df618632ca13c2e96f2b
http://git.kernel.org/stable/c/1da750d1e2140ef43d64d17f301ff6f41b45541e
http://git.kernel.org/stable/c/7721221e87d25c9840d9ca6b986dbdc410d5ce2b
http://git.kernel.org/stable/c/4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5
http://git.kernel.org/stable/c/d82d5303c4c539db86588ffb5dc5b26c3f1513e8

---

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.