AZL-51198
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-51198.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-51198
- Upstream
- Published
- 2024-10-21T20:15:17Z
- Modified
- 2026-04-21T04:33:06Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- CVE-2024-50041 affecting package kernel for versions less than 6.6.57.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
i40e: Fix macvlan leak by synchronizing access to mac_filter_hash
This patch addresses a macvlan leak issue in the i40e driver caused by concurrent access to vsi->mac_filter_hash. The leak occurs when multiple threads attempt to modify the mac_filter_hash simultaneously, leading to inconsistent state and potential memory leaks.
To fix this, we now wrap the calls to i40e_del_mac_filter() and zeroing vf->default_lan_addr.addr with spin_lock/unlock_bh(&vsi->mac_filter_hash_lock), ensuring atomic operations and preventing concurrent access.
Additionally, we add lockdep_assert_held(&vsi->mac_filter_hash_lock) in i40e_add_mac_filter() to help catch similar issues in the future.
Reproduction steps:
- Spawn VFs and configure port vlan on them.
- Trigger concurrent macvlan operations (e.g., adding and deleting portvlan and/or mac filters).
- Observe the potential memory leak and inconsistent state in the mac_filter_hash.
This synchronization ensures the integrity of the mac_filter_hash and prevents the described leak.
- References