CVE-2023-54148

A flaw was identified in the Linux kernel’s Mellanox mlx5 Ethernet driver (net/mlx5e) related to the cleanup order of neighbour information when handling offloaded IP tunnel encapsulation rules in ECMP (Equal-Cost Multipath) mode. In certain scenarios — such as unloading the eswitch device while an offloaded ECMP rule is still active — the representor neighbour data for the peer uplink may be cleaned up prematurely in the profile->disable callback before the intended profile->cleanup_tx callback. This premature cleanup can result in a use-after-free condition when subsequent code attempts to access the freed neighbour data, potentially leading to kernel faults

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.