#VU91303 Stack-based buffer overflow in Linux kernel - CVE-2021-46931

Vulnerability identifier: #VU91303

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-46931

CWE-ID: CWE-121

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 perform a denial of service (DoS) attack.

The vulnerability exists due to stack overflow within the mlx5e_tx_reporter_dump_sq() and mlx5e_reporter_tx_timeout() functions in drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c. A local user can perform a denial of service (DoS) attack.

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/73665165b64a8f3c5b3534009a69be55bb744f05
https://git.kernel.org/stable/c/07f13d58a8ecc3baf9a488588fb38c5cb0db484f
https://git.kernel.org/stable/c/918fc3855a6507a200e9cf22c20be852c0982687

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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.