AZL-51159
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-51159.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-51159
- Upstream
- Published
- 2024-10-21T20:15:17Z
- Modified
- 2026-04-01T05:16:23.668626Z
- 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 5.15.173.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
i40e: Fix macvlan leak by synchronizing access to macfilterhash
This patch addresses a macvlan leak issue in the i40e driver caused by concurrent access to vsi->macfilterhash. The leak occurs when multiple threads attempt to modify the macfilterhash simultaneously, leading to inconsistent state and potential memory leaks.
To fix this, we now wrap the calls to i40edelmacfilter() and zeroing vf->defaultlanaddr.addr with spinlock/unlockbh(&vsi->macfilterhashlock), ensuring atomic operations and preventing concurrent access.
Additionally, we add lockdepassertheld(&vsi->macfilterhashlock) in i40eaddmacfilter() to help catch similar issues in the future.
Reproduction steps: 1. Spawn VFs and configure port vlan on them. 2. Trigger concurrent macvlan operations (e.g., adding and deleting portvlan and/or mac filters). 3. Observe the potential memory leak and inconsistent state in the macfilterhash.
This synchronization ensures the integrity of the macfilterhash and prevents the described leak.
- References