{"id":"CVE-2026-74383","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74383","summary":"nvme-pci: fix out-of-bounds access in nvme_setup_descriptor_pools","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: fix out-of-bounds access in nvme_setup_descriptor_pools\n\nnvme_setup_descriptor_pools() indexes dev->descriptor_pools[] using the\nnuma_node forwarded from hctx->numa_node by its single caller,\nnvme_init_hctx_common().  On a non-NUMA kernel hctx->numa_node is\nNUMA_NO_NODE (-1).  Because the parameter was declared 'unsigned', the\nvalue becomes UINT_MAX and the index walks off the array (sized to\nnr_node_ids), faulting during nvme_alloc_ns() and leaving the namespace\nwithout a /dev node.\n\nReproduces on any NVMe controller probed by a CONFIG_NUMA=n kernel:\n\n  BUG: unable to handle page fault for address: ffff889101603d38\n  RIP: 0010:nvme_init_hctx_common+0x5a/0x190 [nvme]\n  Call Trace:\n   nvme_init_hctx+0x10/0x20 [nvme]\n   nvme_alloc_ns+0x9e/0xa10 [nvme_core]\n   nvme_scan_ns+0x301/0x3b0 [nvme_core]\n   nvme_scan_ns_async+0x23/0x30 [nvme_core]\n\nSwitch the parameter to int and fall back to node 0 when it is\nNUMA_NO_NODE; node 0 is always present.","published":"2026-08-15T05:58:59.767Z","modified":"2026-08-18T03:56:54.426152302Z","cvss":{"score":8.4,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.18.40"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3e8aed5edaeeb237f97255d711aac6b5843fc059"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a192b8cfa447e1b3701a13434a31c392b2e7ed29"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fa9b6accd1ad7af6914b409c6b003c417724c299"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74383.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74383"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:54.426152302Z"}}