{"id":"AZL-51376","summary":"CVE-2024-50040 affecting package kernel for versions less than 5.15.173.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nigb: Do not bring the device up after non-fatal error\n\nCommit 004d25060c78 (\"igb: Fix igb_down hung on surprise removal\")\nchanged igb_io_error_detected() to ignore non-fatal pcie errors in order\nto avoid hung task that can happen when igb_down() is called multiple\ntimes. This caused an issue when processing transient non-fatal errors.\nigb_io_resume(), which is called after igb_io_error_detected(), assumes\nthat device is brought down by igb_io_error_detected() if the interface\nis up. This resulted in panic with stacktrace below.\n\n[ T3256] igb 0000:09:00.0 haeth0: igb: haeth0 NIC Link is Down\n[  T292] pcieport 0000:00:1c.5: AER: Uncorrected (Non-Fatal) error received: 0000:09:00.0\n[  T292] igb 0000:09:00.0: PCIe Bus Error: severity=Uncorrected (Non-Fatal), type=Transaction Layer, (Requester ID)\n[  T292] igb 0000:09:00.0:   device [8086:1537] error status/mask=00004000/00000000\n[  T292] igb 0000:09:00.0:    [14] CmpltTO [  200.105524,009][  T292] igb 0000:09:00.0: AER:   TLP Header: 00000000 00000000 00000000 00000000\n[  T292] pcieport 0000:00:1c.5: AER: broadcast error_detected message\n[  T292] igb 0000:09:00.0: Non-correctable non-fatal error reported.\n[  T292] pcieport 0000:00:1c.5: AER: broadcast mmio_enabled message\n[  T292] pcieport 0000:00:1c.5: AER: broadcast resume message\n[  T292] ------------[ cut here ]------------\n[  T292] kernel BUG at net/core/dev.c:6539!\n[  T292] invalid opcode: 0000 [#1] PREEMPT SMP\n[  T292] RIP: 0010:napi_enable+0x37/0x40\n[  T292] Call Trace:\n[  T292]  \u003cTASK\u003e\n[  T292]  ? die+0x33/0x90\n[  T292]  ? do_trap+0xdc/0x110\n[  T292]  ? napi_enable+0x37/0x40\n[  T292]  ? do_error_trap+0x70/0xb0\n[  T292]  ? napi_enable+0x37/0x40\n[  T292]  ? napi_enable+0x37/0x40\n[  T292]  ? exc_invalid_op+0x4e/0x70\n[  T292]  ? napi_enable+0x37/0x40\n[  T292]  ? asm_exc_invalid_op+0x16/0x20\n[  T292]  ? napi_enable+0x37/0x40\n[  T292]  igb_up+0x41/0x150\n[  T292]  igb_io_resume+0x25/0x70\n[  T292]  report_resume+0x54/0x70\n[  T292]  ? report_frozen_detected+0x20/0x20\n[  T292]  pci_walk_bus+0x6c/0x90\n[  T292]  ? aer_print_port_info+0xa0/0xa0\n[  T292]  pcie_do_recovery+0x22f/0x380\n[  T292]  aer_process_err_devices+0x110/0x160\n[  T292]  aer_isr+0x1c1/0x1e0\n[  T292]  ? disable_irq_nosync+0x10/0x10\n[  T292]  irq_thread_fn+0x1a/0x60\n[  T292]  irq_thread+0xe3/0x1a0\n[  T292]  ? irq_set_affinity_notifier+0x120/0x120\n[  T292]  ? irq_affinity_notify+0x100/0x100\n[  T292]  kthread+0xe2/0x110\n[  T292]  ? kthread_complete_and_exit+0x20/0x20\n[  T292]  ret_from_fork+0x2d/0x50\n[  T292]  ? kthread_complete_and_exit+0x20/0x20\n[  T292]  ret_from_fork_asm+0x11/0x20\n[  T292]  \u003c/TASK\u003e\n\nTo fix this issue igb_io_resume() checks if the interface is running and\nthe device is not down this means igb_io_error_detected() did not bring\nthe device down and there is no need to bring it up.","modified":"2026-04-01T05:17:43.591153Z","published":"2024-10-21T20:15:17Z","upstream":["CVE-2024-50040"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50040"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.173.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-51376.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"}]}