#VU91206 Buffer overflow in Linux kernel - CVE-2021-47137

Vulnerability identifier: #VU91206

Vulnerability 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-2021-47137

CWE-ID: CWE-119

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 memory corruption within the xrx200_close(), xrx200_alloc_skb() and xrx200_hw_receive() functions in drivers/net/ethernet/lantiq_xrx200.c. A local user can escalate privileges on the system.

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/8bb1077448d43a871ed667520763e3b9f9b7975d
https://git.kernel.org/stable/c/5ac72351655f8b033a2935646f53b7465c903418
https://git.kernel.org/stable/c/46dd4abced3cb2c912916f4a5353e0927db0c4a2
https://git.kernel.org/stable/c/c7718ee96dbc2f9c5fc3b578abdf296dd44b9c20

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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.