{"id":"DEBIAN-CVE-2026-68347","details":"In the Linux kernel, the following vulnerability has been resolved:  iommu/amd: Fix IRQ unsafe locking in gdom allocation  Lockdep complains:    [  259.410489] =====================================================   [  259.417287] WARNING: HARDIRQ-safe -\u003e HARDIRQ-unsafe lock order detected   [  259.424667] 7.0.0-g51db1d8d2113 #54 Not tainted   [  259.429718] -----------------------------------------------------   [  259.436516] qemu-system-x86/10143 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:   [  259.444670] ff3b2b1c60305170 (&xa-\u003exa_lock#25){+.+.}-{3:3}, at: __domain_flush_pages+0x17c/0x4b0   [  259.454485]                  and this task is already holding:   [  259.460991] ff3b2b1c98504cc0 (&domain-\u003elock){-.-.}-{3:3}, at: amd_iommu_iotlb_sync+0x25/0x60   [  259.470408] which would create a new lock dependency:   [  259.476041]  (&domain-\u003elock){-.-.}-{3:3} -\u003e (&xa-\u003exa_lock#25){+.+.}-{3:3}   [  259.483615]                  but this new dependency connects a HARDIRQ-irq-safe lock:   [  259.492447]  (&domain-\u003elock){-.-.}-{3:3}   [  259.492449]                  ... which became HARDIRQ-irq-safe at:   [  259.503705]   lock_acquire+0xb6/0x2e0   [  259.507790]   _raw_spin_lock_irqsave+0x3e/0x60   [  259.512748]   amd_iommu_flush_iotlb_all+0x20/0x50   [  259.517996]   iommu_dma_free_iova.isra.0+0x1b8/0x1e0   [  259.523534]   __iommu_dma_unmap+0xc2/0x140   [  259.528100]   iommu_dma_unmap_phys+0x55/0xc0   [  259.532863]   dma_unmap_phys+0x274/0x2e0   [  259.537238]   dma_unmap_page_attrs+0x17/0x30   [  259.542000]   nvme_unmap_data+0x13e/0x280   [  259.546473]   nvme_pci_complete_batch+0x45/0x70   [  259.551524]   nvme_irq+0x83/0x90   [  259.555123]   __handle_irq_event_percpu+0x92/0x360   [  259.560466]   handle_irq_event+0x39/0x80   [  259.564841]   handle_edge_irq+0xb2/0x1a0   [  259.569214]   __common_interrupt+0x4e/0x130   [  259.573882]   common_interrupt+0x88/0xa0   [  259.578256]   asm_common_interrupt+0x27/0x40   [  259.583019]   cpuidle_enter_state+0x119/0x5d0   [  259.587877]   cpuidle_enter+0x2e/0x50   [  259.591962]   do_idle+0x153/0x2c0   [  259.595657]   cpu_startup_entry+0x29/0x30   [  259.600128]   start_secondary+0x118/0x150   [  259.604601]   common_startup_64+0x13e/0x141   [  259.609266]                  to a HARDIRQ-irq-unsafe lock:   [  259.615384]  (&xa-\u003exa_lock#25){+.+.}-{3:3}   [  259.615386]                  ... which became HARDIRQ-irq-unsafe at:   [  259.627039] ...   [  259.627039]   lock_acquire+0xb6/0x2e0   [  259.633071]   _raw_spin_lock+0x2f/0x50   [  259.637250]   amd_iommu_alloc_domain_nested+0x140/0x3c0   [  259.643078]   iommufd_hwpt_alloc+0x272/0x800 [iommufd]   [  259.648813]   iommufd_fops_ioctl+0x14e/0x200 [iommufd]   [  259.654547]   __x64_sys_ioctl+0x9d/0xf0   ...  Since amd_iommu_domain_flush_pages() necessarily holds domain-\u003elock to do the flush, switch the allocation side in gdom_info_load_or_alloc_locked() to HARDIRQ-safe allocation. The IOMMU_DESTROY-\u003efree path has the same issue, so switch that path to HARDIRQ-safe locking as well.","modified":"2026-10-01T02:47:55.777535436Z","published":"2026-08-10T13:20:26.553Z","upstream":["CVE-2026-68347"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-68347"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.1.6-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.107-1","6.12.111-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.10-1","6.18.12-1","6.18.12-1~bpo13+1","6.18.13-1","6.18.14-1","6.18.15-1","6.18.15-1~bpo13+1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18.8-1","6.18.9-1","6.18.9-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~rc7-1~exp1","6.19-1~exp1","6.19.10-1","6.19.10-1~bpo13+1","6.19.11-1","6.19.11-1~bpo13+1","6.19.12-1","6.19.13-1","6.19.13-1~bpo13+1","6.19.14-1","6.19.14-1~bpo13+1","6.19.2-1~exp1","6.19.3-1~exp1","6.19.4-1~exp1","6.19.5-1~exp1","6.19.6-1","6.19.6-2","6.19.6-2~bpo13+1","6.19.8-1","6.19.8-1~bpo13+1","6.19~rc4-1~exp1","6.19~rc5-1~exp1","6.19~rc6-1~exp1","6.19~rc7-1~exp1","6.19~rc8-1~exp1","7.0-1~exp1","7.0.1-1~exp1","7.0.10-1","7.0.10-1~bpo13+1","7.0.12-1","7.0.12-2","7.0.12-2~bpo13+1","7.0.13-1","7.0.13-1~bpo13+1","7.0.14-1","7.0.3-1","7.0.4-1","7.0.4-1~bpo13+1","7.0.7-1","7.0.7-1~bpo13+1","7.0.9-1","7.0.9-1~bpo13+1","7.1.1-1~exp1","7.1.2-1~exp1","7.1.3-1","7.1.3-1+sunvdc","7.1.3-1~bpo13+1","7.1.4-1","7.1.5-1","7.1~rc2-1~exp1","7.1~rc3-1~exp1","7.1~rc4-1~exp1","7.1~rc4-1~exp2","7.1~rc5-1~exp1","7.1~rc7-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-68347.json"}}],"schema_version":"1.9.0"}