{"id":"AZL-57740","summary":"CVE-2024-41023 affecting package kernel 6.6.126.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched/deadline: Fix task_struct reference leak\n\nDuring the execution of the following stress test with linux-rt:\n\nstress-ng --cyclic 30 --timeout 30 --minimize --quiet\n\nkmemleak frequently reported a memory leak concerning the task_struct:\n\nunreferenced object 0xffff8881305b8000 (size 16136):\n  comm \"stress-ng\", pid 614, jiffies 4294883961 (age 286.412s)\n  object hex dump (first 32 bytes):\n    02 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00  .@..............\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  debug hex dump (first 16 bytes):\n    53 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00  S...............\n  backtrace:\n    [\u003c00000000046b6790\u003e] dup_task_struct+0x30/0x540\n    [\u003c00000000c5ca0f0b\u003e] copy_process+0x3d9/0x50e0\n    [\u003c00000000ced59777\u003e] kernel_clone+0xb0/0x770\n    [\u003c00000000a50befdc\u003e] __do_sys_clone+0xb6/0xf0\n    [\u003c000000001dbf2008\u003e] do_syscall_64+0x5d/0xf0\n    [\u003c00000000552900ff\u003e] entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\nThe issue occurs in start_dl_timer(), which increments the task_struct\nreference count and sets a timer. The timer callback, dl_task_timer,\nis supposed to decrement the reference count upon expiration. However,\nif enqueue_task_dl() is called before the timer expires and cancels it,\nthe reference count is not decremented, leading to the leak.\n\nThis patch fixes the reference leak by ensuring the task_struct\nreference count is properly decremented when the timer is canceled.","modified":"2026-04-01T05:19:11.812582Z","published":"2024-07-29T15:15:11Z","upstream":["CVE-2024-41023"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-41023"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.126.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-57740.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"}]}