#VU90277 Out-of-bounds read in Linux kernel - CVE-2021-47441

Vulnerability identifier: #VU90277

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-2021-47441

CWE-ID: CWE-125

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 an out-of-bounds read error within the MLXSW_THERMAL_TEMP_SCORE_MAX GENMASK(), mlxsw_thermal_set_cur_state() and mlxsw_thermal_init() functions in drivers/net/ethernet/mellanox/mlxsw/core_thermal.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/ae0993739e14a102d506aa09e11b0065f3144f10
https://git.kernel.org/stable/c/e59d839743b50cb1d3f42a786bea48cc5621d254
https://git.kernel.org/stable/c/df8e58716afb3bee2b59de66b1ba1033f2e26303
https://git.kernel.org/stable/c/332fdf951df8b870e3da86b122ae304e2aabe88c

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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.