{"cve":"CVE-2026-43475","nvd":{"published":"2026-05-08T15:17:00.687","modified":"2026-06-17T10:49:46.740","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: storvsc: Fix scheduling while atomic on PREEMPT_RT\n\nThis resolves the follow splat and lock-up when running with PREEMPT_RT\nenabled on Hyper-V:\n\n[  415.140818] BUG: scheduling while atomic: stress-ng-iomix/1048/0x00000002\n[  415.140822] INFO: lockdep is turned off.\n[  415.140823] Modules linked in: intel_rapl_msr intel_rapl_common intel_uncore_frequency_common intel_pmc_core pmt_telemetry pmt_discovery pmt_class intel_pmc_ssram_telemetry intel_vsec ghash_clmulni_intel aesni_intel rapl binfmt_misc nls_ascii nls_cp437 vfat fat snd_pcm hyperv_drm snd_timer drm_client_lib drm_shmem_helper snd sg soundcore drm_kms_helper pcspkr hv_balloon hv_utils evdev joydev drm configfs efi_pstore nfnetlink vsock_loopback vmw_vsock_virtio_transport_common hv_sock vmw_vsock_vmci_transport vsock vmw_vmci efivarfs autofs4 ext4 crc16 mbcache jbd2 sr_mod sd_mod cdrom hv_storvsc serio_raw hid_generic scsi_transport_fc hid_hyperv scsi_mod hid hv_netvsc hyperv_keyboard scsi_common\n[  415.140846] Preemption disabled at:\n[  415.140847] [<ffffffffc0656171>] storvsc_queuecommand+0x2e1/0xbe0 [hv_storvsc]\n[  415.140854] CPU: 8 UID: 0 PID: 1048 Comm: stress-ng-iomix Not tainted 6.19.0-rc7 #30 PREEMPT_{RT,(full)}\n[  415.140856] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 09/04/2024\n[  415.140857] Call Trace:\n[  415.140861]  <TASK>\n[  415.140861]  ? storvsc_queuecommand+0x2e1/0xbe0 [hv_storvsc]\n[  415.140863]  dump_stack_lvl+0x91/0xb0\n[  415.140870]  __schedule_bug+0x9c/0xc0\n[  415.140875]  __schedule+0xdf6/0x1300\n[  415.140877]  ? rtlock_slowlock_locked+0x56c/0x1980\n[  415.140879]  ? rcu_is_watching+0x12/0x60\n[  415.140883]  schedule_rtlock+0x21/0x40\n[  415.140885]  rtlock_slowlock_locked+0x502/0x1980\n[  415.140891]  rt_spin_lock+0x89/0x1e0\n[  415.140893]  hv_ringbuffer_write+0x87/0x2a0\n[  415.140899]  vmbus_sendpacket_mpb_desc+0xb6/0xe0\n[  415.140900]  ? rcu_is_watching+0x12/0x60\n[  415.140902]  storvsc_queuecommand+0x669/0xbe0 [hv_storvsc]\n[  415.140904]  ? HARDIRQ_verbose+0x10/0x10\n[  415.140908]  ? __rq_qos_issue+0x28/0x40\n[  415.140911]  scsi_queue_rq+0x760/0xd80 [scsi_mod]\n[  415.140926]  __blk_mq_issue_directly+0x4a/0xc0\n[  415.140928]  blk_mq_issue_direct+0x87/0x2b0\n[  415.140931]  blk_mq_dispatch_queue_requests+0x120/0x440\n[  415.140933]  blk_mq_flush_plug_list+0x7a/0x1a0\n[  415.140935]  __blk_flush_plug+0xf4/0x150\n[  415.140940]  __submit_bio+0x2b2/0x5c0\n[  415.140944]  ? submit_bio_noacct_nocheck+0x272/0x360\n[  415.140946]  submit_bio_noacct_nocheck+0x272/0x360\n[  415.140951]  ext4_read_bh_lock+0x3e/0x60 [ext4]\n[  415.140995]  ext4_block_write_begin+0x396/0x650 [ext4]\n[  415.141018]  ? __pfx_ext4_da_get_block_prep+0x10/0x10 [ext4]\n[  415.141038]  ext4_da_write_begin+0x1c4/0x350 [ext4]\n[  415.141060]  generic_perform_write+0x14e/0x2c0\n[  415.141065]  ext4_buffered_write_iter+0x6b/0x120 [ext4]\n[  415.141083]  vfs_write+0x2ca/0x570\n[  415.141087]  ksys_write+0x76/0xf0\n[  415.141089]  do_syscall_64+0x99/0x1490\n[  415.141093]  ? rcu_is_watching+0x12/0x60\n[  415.141095]  ? finish_task_switch.isra.0+0xdf/0x3d0\n[  415.141097]  ? rcu_is_watching+0x12/0x60\n[  415.141098]  ? lock_release+0x1f0/0x2a0\n[  415.141100]  ? rcu_is_watching+0x12/0x60\n[  415.141101]  ? finish_task_switch.isra.0+0xe4/0x3d0\n[  415.141103]  ? rcu_is_watching+0x12/0x60\n[  415.141104]  ? __schedule+0xb34/0x1300\n[  415.141106]  ? hrtimer_try_to_cancel+0x1d/0x170\n[  415.141109]  ? do_nanosleep+0x8b/0x160\n[  415.141111]  ? hrtimer_nanosleep+0x89/0x100\n[  415.141114]  ? __pfx_hrtimer_wakeup+0x10/0x10\n[  415.141116]  ? xfd_validate_state+0x26/0x90\n[  415.141118]  ? rcu_is_watching+0x12/0x60\n[  415.141120]  ? do_syscall_64+0x1e0/0x1490\n[  415.141121]  ? do_syscall_64+0x1e0/0x1490\n[  415.141123]  ? rcu_is_watching+0x12/0x60\n[  415.141124]  ? do_syscall_64+0x1e0/0x1490\n[  415.141125]  ? do_syscall_64+0x1e0/0x1490\n[  415.141127]  ? irqentry_exit+0x140/0\n---truncated---","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/57297736c08233987e5d29ce6584c6ca2a831b12","https://git.kernel.org/stable/c/91ab59f76d0866079420ebff1c7959fcd87a242e","https://git.kernel.org/stable/c/b82462af23e45e066dd56d2736ea70159a6ad647","https://git.kernel.org/stable/c/c2e73d8acd056347a70047e6be7cd98e0e811dfa","https://git.kernel.org/stable/c/c7984d196476adcbd51c0ce386d7e90277198d57"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-43475","score":0.00114,"percentile":0.0148,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}