{"id":"CVE-2026-46141","summary":"powerpc/xive: fix kmemleak caused by incorrect chip_data lookup","details":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/xive: fix kmemleak caused by incorrect chip_data lookup\n\nThe kmemleak reports the following memory leak:\n\nUnreferenced object 0xc0000002a7fbc640 (size 64):\n  comm \"kworker/8:1\", pid 540, jiffies 4294937872\n  hex dump (first 32 bytes):\n    01 00 00 00 00 00 00 00 00 00 09 04 00 04 00 00  ................\n    00 00 a7 81 00 00 0a c0 00 00 08 04 00 04 00 00  ................\n  backtrace (crc 177d48f6):\n    __kmalloc_cache_noprof+0x520/0x730\n    xive_irq_alloc_data.constprop.0+0x40/0xe0\n    xive_irq_domain_alloc+0xd0/0x1b0\n    irq_domain_alloc_irqs_parent+0x44/0x6c\n    pseries_irq_domain_alloc+0x1cc/0x354\n    irq_domain_alloc_irqs_parent+0x44/0x6c\n    msi_domain_alloc+0xb0/0x220\n    irq_domain_alloc_irqs_locked+0x138/0x4d0\n    __irq_domain_alloc_irqs+0x8c/0xfc\n    __msi_domain_alloc_irqs+0x214/0x4d8\n    msi_domain_alloc_irqs_all_locked+0x70/0xf8\n    pci_msi_setup_msi_irqs+0x60/0x78\n    __pci_enable_msix_range+0x54c/0x98c\n    pci_alloc_irq_vectors_affinity+0x16c/0x1d4\n    nvme_pci_enable+0xac/0x9c0 [nvme]\n    nvme_probe+0x340/0x764 [nvme]\n\nThis occurs when allocating MSI-X vectors for an NVMe device. During\nallocation the XIVE code creates a struct xive_irq_data and stores it\nin irq_data-\u003echip_data.\n\nWhen the MSI-X irqdomain is later freed, xive_irq_free_data() is\nresponsible for retrieving this structure and freeing it. However,\nafter commit cc0cc23babc9 (\"powerpc/xive: Untangle xive from child\ninterrupt controller drivers\"), xive_irq_free_data() retrieves the\nchip_data using irq_get_chip_data(), which looks up the data through\nthe child domain.\n\nThis is incorrect because the XIVE-specific irq data is associated with\nthe XIVE (parent) domain. As a result the lookup fails and the allocated\nstruct xive_irq_data is never freed, leading to the kmemleak report\nshown above.\n\nFix this by retrieving the irq_data from the correct domain using\nirq_domain_get_irq_data() and then accessing the chip_data via\nirq_data_get_irq_chip_data().","modified":"2026-07-08T08:13:35.286532530Z","published":"2026-05-28T09:35:56.940Z","related":["openSUSE-SU-2026:10954-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46141.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2546fb8c9acc8c7512ed4339ce2a982cb7407065"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6771c54728c278bf1e4bfdab4fddbbb186e33498"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e66ed135cdf23a318e9727dca48f98f7f6142f78"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46141.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46141"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cc0cc23babc979e399f34f53e4bccf702a389558"},{"fixed":"2546fb8c9acc8c7512ed4339ce2a982cb7407065"},{"fixed":"e66ed135cdf23a318e9727dca48f98f7f6142f78"},{"fixed":"6771c54728c278bf1e4bfdab4fddbbb186e33498"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46141.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.18.0"},{"fixed":"6.18.30"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46141.json"}}],"schema_version":"1.7.5"}