{"id":"CVE-2024-41066","summary":"ibmvnic: Add tx check to prevent skb leak","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nibmvnic: Add tx check to prevent skb leak\n\nBelow is a summary of how the driver stores a reference to an skb during\ntransmit:\n    tx_buff[free_map[consumer_index]]-\u003eskb = new_skb;\n    free_map[consumer_index] = IBMVNIC_INVALID_MAP;\n    consumer_index ++;\nWhere variable data looks like this:\n    free_map == [4, IBMVNIC_INVALID_MAP, IBMVNIC_INVALID_MAP, 0, 3]\n                                               \tconsumer_index^\n    tx_buff == [skb=null, skb=\u003cptr\u003e, skb=\u003cptr\u003e, skb=null, skb=null]\n\nThe driver has checks to ensure that free_map[consumer_index] pointed to\na valid index but there was no check to ensure that this index pointed\nto an unused/null skb address. So, if, by some chance, our free_map and\ntx_buff lists become out of sync then we were previously risking an\nskb memory leak. This could then cause tcp congestion control to stop\nsending packets, eventually leading to ETIMEDOUT.\n\nTherefore, add a conditional to ensure that the skb address is null. If\nnot then warn the user (because this is still a bug that should be\npatched) and free the old pointer to prevent memleak/tcp problems.","modified":"2026-03-20T12:35:37.203238Z","published":"2024-07-29T14:57:27.832Z","related":["ALSA-2024:8856","ALSA-2024:8870","MGASA-2024-0277","MGASA-2024-0278","SUSE-SU-2024:2892-1","SUSE-SU-2024:2894-1","SUSE-SU-2024:2901-1","SUSE-SU-2024:2939-1","SUSE-SU-2024:2940-1","SUSE-SU-2024:2947-1","SUSE-SU-2024:3194-1","SUSE-SU-2024:3195-1","SUSE-SU-2024:3383-1","SUSE-SU-2025:20044-1","SUSE-SU-2025:20047-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41066.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0983d288caf984de0202c66641577b739caad561"},{"type":"WEB","url":"https://git.kernel.org/stable/c/16ad1557cae582e79bb82dddd612d9bdfaa11d4c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/267c61c4afed0ff9a2e83462abad3f41d8ca1f06"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e7b75def33eae61ddaad6cb616c517dc3882eb2a"},{"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/2024/41xxx/CVE-2024-41066.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-41066"},{"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":"65d6470d139a6c1655fccb5cbacbeaba8e8ad2f8"},{"fixed":"16ad1557cae582e79bb82dddd612d9bdfaa11d4c"},{"fixed":"267c61c4afed0ff9a2e83462abad3f41d8ca1f06"},{"fixed":"e7b75def33eae61ddaad6cb616c517dc3882eb2a"},{"fixed":"0983d288caf984de0202c66641577b739caad561"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"1a64564eee05128f773930649edfdd50cbe80656"},{"last_affected":"5142c39253385702a4de8f897027e1d76fc333de"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-41066.json"}}],"schema_version":"1.7.5"}