{"id":"CVE-2026-90082","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Cap MSI-X vectors to the device MSI-X table size\n\nmana_gd_query_max_resources() sizes gc->num_msix_usable from resp.max_msix\nand the CPU count, but never fro…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Cap MSI-X vectors to the device MSI-X table size\n\nmana_gd_query_max_resources() sizes gc->num_msix_usable from resp.max_msix\nand the CPU count, but never fro…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 755391121038c06cb653241aa94dcabd87179f62 < 4f9827b314ee57cd99f86f8dbadcaf567112e2b2","Linux >= 755391121038c06cb653241aa94dcabd87179f62 < 2c7493f980140a5c40eb4f98f97c557193a2c330","Linux 6.17"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:16:57.573","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90082","references":[{"url":"https://git.kernel.org/stable/c/2c7493f980140a5c40eb4f98f97c557193a2c330","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4f9827b314ee57cd99f86f8dbadcaf567112e2b2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.895Z","epss":0.00189,"epssPercentile":0.08787,"slug":"CVE-2026-90082","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Cap MSI-X vectors to the device MSI-X table size\n\nmana_gd_query_max_resources() sizes gc->num_msix_usable from resp.max_msix\nand the CPU count, but never from the device MSI-X table. On a 1792 vCPU\nM-series VM that yields 1793 while the table has 1024 entries, and\nmana_gd_setup_remaining_irqs() then walks indices 1..1792, running off the\nend of the region mapped by msix_map_region():\n\n  BUG: unable to handle page fault for address: ff8e347f8b99800c\n  RIP: 0010:msix_prepare_msi_desc+0x7a/0x90\n  RAX: 0000000000004000 RBX: ff4330cb164ea780 RCX: ff8e347f8b998000\n  Call Trace:\n   <TASK>\n   __msi_domain_alloc_irqs+0x13a/0x440\n   msi_domain_alloc_irq_at+0x149/0x1b0\n   mana_gd_setup+0x351/0x890\n   mana_gd_probe+0x274/0x390\n   </TASK>\n\nRAX is index 1024 * PCI_MSIX_ENTRY_SIZE, one entry past the table.\n\nmsi_insert_desc() does range check the index, but only against the MSI\ndomain hwsize, which matches the table only for devices on an MSI parent\ndomain. With a global PCI/MSI domain hwsize is MSI_XA_DOMAIN_SIZE, so\nnothing bounds the request.\n\nCap num_msix_usable with pci_msix_vec_count().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}