{"id":"CVE-2026-90082","revision":"04e41e0bc5e54def8b027ae7513d43e6","records":[{"revision":"04e41e0bc5e54def8b027ae7513d43e6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90082","aliases":[],"title":"net: mana: Cap MSI-X vectors to the device MSI-X table size","description":"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 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().","state":0,"publishedAt":"2026-09-17T16:05:59.532+00:00","modifiedAt":"2026-10-19T08:57:38.727+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/ethernet/microsoft/mana/gdma_main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"755391121038c06cb653241aa94dcabd87179f62\",\n                            \"lessThan\": \"7b3e08eea1e8cae37e84540c5cb4aee4887e46ac\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"755391121038c06cb653241aa94dcabd87179f62\",\n                            \"lessThan\": \"4f9827b314ee57cd99f86f8dbadcaf567112e2b2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"755391121038c06cb653241aa94dcabd87179f62\",\n                            \"lessThan\": \"2c7493f980140a5c40eb4f98f97c557193a2c330\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/ethernet/microsoft/mana/gdma_main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.17\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.17\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/7b3e08eea1e8cae37e84540c5cb4aee4887e46ac","https://git.kernel.org/stable/c/4f9827b314ee57cd99f86f8dbadcaf567112e2b2","https://git.kernel.org/stable/c/2c7493f980140a5c40eb4f98f97c557193a2c330"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90082","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90082","identifiers":["CVE-2026-90082"]},"retained":false,"historicalAffected":[]}],"coverage":[]}