CVE-2024-50041 (GCVE-0-2024-50041)

Vulnerability from cvelistv5 – Published: 2024-10-21 19:39 – Updated: 2025-11-03 22:24
VLAI?
Title
i40e: Fix macvlan leak by synchronizing access to mac_filter_hash
Summary
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: 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 mac_filter_hash. This synchronization ensures the integrity of the mac_filter_hash and prevents the described leak.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ddec6cbbe22781d17965f1e6386e5a6363c058d2 , < 9db6ce9e2738b05a3672aff4d42169cf3bb5a3e3 (git)
Affected: fed0d9f13266a22ce1fc9a97521ef9cdc6271a23 , < 9a9747288ba0a9ad4f5c9877f18dd245770ad64e (git)
Affected: fed0d9f13266a22ce1fc9a97521ef9cdc6271a23 , < 703c4d820b31bcadf465288d5746c53445f02a55 (git)
Affected: fed0d9f13266a22ce1fc9a97521ef9cdc6271a23 , < 8831abff1bd5b6bc8224f0c0671f46fbd702b5b2 (git)
Affected: fed0d9f13266a22ce1fc9a97521ef9cdc6271a23 , < dac6c7b3d33756d6ce09f00a96ea2ecd79fae9fb (git)
Affected: 8bfcbaa379694e05290fcff21f4bd40afcf88776 (git)
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    Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.57 , ≤ 6.6.* (semver)
Unaffected: 6.11.4 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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