Memory leak in Linux kernel - CVE-2021-47199
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90476
CSH Severity: Low
CVSSv4.0: 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-2021-47199
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the parse_tc_nic_actions() and parse_tc_fdb_actions() functions in drivers/net/ethernet/mellanox/mlx5/core/en_tc.c, within the mlx5_tc_ct_match_add(), mlx5_tc_ct_parse_action() and __mlx5_tc_ct_flow_offload_clear() functions in drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.