{"id":"CVE-2024-50041","summary":"i40e: Fix macvlan leak by synchronizing access to mac_filter_hash","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: Fix macvlan leak by synchronizing access to mac_filter_hash\n\nThis patch addresses a macvlan leak issue in the i40e driver caused by\nconcurrent access to vsi-\u003emac_filter_hash. The leak occurs when multiple\nthreads attempt to modify the mac_filter_hash simultaneously, leading to\ninconsistent state and potential memory leaks.\n\nTo fix this, we now wrap the calls to i40e_del_mac_filter() and zeroing\nvf-\u003edefault_lan_addr.addr with spin_lock/unlock_bh(&vsi-\u003emac_filter_hash_lock),\nensuring atomic operations and preventing concurrent access.\n\nAdditionally, we add lockdep_assert_held(&vsi-\u003emac_filter_hash_lock) in\ni40e_add_mac_filter() to help catch similar issues in the future.\n\nReproduction steps:\n1. Spawn VFs and configure port vlan on them.\n2. Trigger concurrent macvlan operations (e.g., adding and deleting\n\tportvlan and/or mac filters).\n3. Observe the potential memory leak and inconsistent state in the\n\tmac_filter_hash.\n\nThis synchronization ensures the integrity of the mac_filter_hash and prevents\nthe described leak.","modified":"2026-04-16T04:32:04.408617733Z","published":"2024-10-21T19:39:40.435Z","related":["SUSE-SU-2024:3983-1","SUSE-SU-2024:3984-1","SUSE-SU-2024:3985-1","SUSE-SU-2024:3986-1","SUSE-SU-2024:4318-1","SUSE-SU-2024:4364-1","SUSE-SU-2024:4387-1","SUSE-SU-2025:20163-1","SUSE-SU-2025:20164-1","SUSE-SU-2025:20246-1","SUSE-SU-2025:20247-1","USN-7276-1","USN-7277-1","openSUSE-SU-2024:14500-1","openSUSE-SU-2025:14705-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50041.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/703c4d820b31bcadf465288d5746c53445f02a55"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8831abff1bd5b6bc8224f0c0671f46fbd702b5b2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9a9747288ba0a9ad4f5c9877f18dd245770ad64e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9db6ce9e2738b05a3672aff4d42169cf3bb5a3e3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dac6c7b3d33756d6ce09f00a96ea2ecd79fae9fb"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50041.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50041"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ddec6cbbe22781d17965f1e6386e5a6363c058d2"},{"fixed":"9db6ce9e2738b05a3672aff4d42169cf3bb5a3e3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"fed0d9f13266a22ce1fc9a97521ef9cdc6271a23"},{"fixed":"9a9747288ba0a9ad4f5c9877f18dd245770ad64e"},{"fixed":"703c4d820b31bcadf465288d5746c53445f02a55"},{"fixed":"8831abff1bd5b6bc8224f0c0671f46fbd702b5b2"},{"fixed":"dac6c7b3d33756d6ce09f00a96ea2ecd79fae9fb"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"8bfcbaa379694e05290fcff21f4bd40afcf88776"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-50041.json"}}],"schema_version":"1.7.5"}