{"id":"AZL-52061","summary":"CVE-2024-50077 affecting package kernel for versions less than 6.6.64.2-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: Fix multiple init when debugfs is disabled\n\nIf bt_debugfs is not created successfully, which happens if either\nCONFIG_DEBUG_FS or CONFIG_DEBUG_FS_ALLOW_ALL is unset, then iso_init()\nreturns early and does not set iso_inited to true. This means that a\nsubsequent call to iso_init() will result in duplicate calls to\nproto_register(), bt_sock_register(), etc.\n\nWith CONFIG_LIST_HARDENED and CONFIG_BUG_ON_DATA_CORRUPTION enabled, the\nduplicate call to proto_register() triggers this BUG():\n\n  list_add double add: new=ffffffffc0b280d0, prev=ffffffffbab56250,\n    next=ffffffffc0b280d0.\n  ------------[ cut here ]------------\n  kernel BUG at lib/list_debug.c:35!\n  Oops: invalid opcode: 0000 [#1] PREEMPT SMP PTI\n  CPU: 2 PID: 887 Comm: bluetoothd Not tainted 6.10.11-1-ao-desktop #1\n  RIP: 0010:__list_add_valid_or_report+0x9a/0xa0\n  ...\n    __list_add_valid_or_report+0x9a/0xa0\n    proto_register+0x2b5/0x340\n    iso_init+0x23/0x150 [bluetooth]\n    set_iso_socket_func+0x68/0x1b0 [bluetooth]\n    kmem_cache_free+0x308/0x330\n    hci_sock_sendmsg+0x990/0x9e0 [bluetooth]\n    __sock_sendmsg+0x7b/0x80\n    sock_write_iter+0x9a/0x110\n    do_iter_readv_writev+0x11d/0x220\n    vfs_writev+0x180/0x3e0\n    do_writev+0xca/0x100\n  ...\n\nThis change removes the early return. The check for iso_debugfs being\nNULL was unnecessary, it is always NULL when iso_inited is false.","modified":"2026-04-01T05:16:28.728939Z","published":"2024-10-29T01:15:04Z","upstream":["CVE-2024-50077"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50077"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.64.2-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-52061.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}