Vulnerability identifier: #VU91342

Vulnerability risk: Low

CVSSv3.1: 2.9 [AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47246

CWE-ID: CWE-200

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 gain access to sensitive information.

The vulnerability exists due to information disclosure within the mlx5_hairpin_unpair_peer_sq(), mlx5_hairpin_unpair_queues() and mlx5_core_hairpin_destroy() functions in drivers/net/ethernet/mellanox/mlx5/core/transobj.c, within the mlx5e_tc_hairpin_update_dead_peer() function in drivers/net/ethernet/mellanox/mlx5/core/en_tc.c. A local user can gain access to sensitive information.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
http://git.kernel.org/stable/c/4b16118665e94c90a3e84a5190486fd0e4eedd74
http://git.kernel.org/stable/c/be7f3f401d224e1efe8112b2fa8b837eeb8c5e52
http://git.kernel.org/stable/c/b374c1304f6d3d4752ad1412427b7bf02bb1fd61
http://git.kernel.org/stable/c/a3e5fd9314dfc4314a9567cde96e1aef83a7458a

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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.