SB2024053120 - Use-after-free in Linux kernel en rep driver

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Main Vulnerability Database SB2024053120

SB2024053120 - Use-after-free in Linux kernel en rep driver

Published: May 31, 2024 Updated: May 14, 2025

Security Bulletin ID SB2024053120
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2021-47247)

CWE-ID: CWE-416 - Use After Free

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


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the mlx5e_take_all_route_decap_flows() and mlx5e_encap_valid() functions in drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c, within the wait_for_completion() and mlx5e_take_all_encap_flows() functions in drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c, within the mlx5e_rep_neigh_update() and mlx5e_rep_update_flows() functions in drivers/net/ethernet/mellanox/mlx5/core/en/rep/neigh.c. A local user can escalate privileges on the system.


Remediation

Install update from vendor's website.

References