Information disclosure in Linux kernel - CVE-2021-47246
Published: June 8, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91342
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47246
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability 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.
How to mitigate CVE-2021-47246
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/4b16118665e94c90a3e84a5190486fd0e4eedd74
- https://git.kernel.org/stable/c/be7f3f401d224e1efe8112b2fa8b837eeb8c5e52
- https://git.kernel.org/stable/c/b374c1304f6d3d4752ad1412427b7bf02bb1fd61
- https://git.kernel.org/stable/c/a3e5fd9314dfc4314a9567cde96e1aef83a7458a
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.46
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.128