CVE-2026-74383
HighCVSS 8.4Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
In the Linux kernel, the nvme-pci driver has an out-of-bounds access in nvme_setup_descriptor_pools. On non-NUMA kernels, hctx->numa_node is -1, but the parameter is declared as 'unsigned', causing the index to become UINT_MAX and walk off the array, leading to a page fault.
Risk Assessment
This can cause system crash during NVMe device initialization, potentially preventing use of storage devices.
Recommendation
Apply the patch that changes the parameter type to int and falls back to node 0 when it is NUMA_NO_NODE.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fix out-of-bounds access in nvme_setup_descriptor_pools nvme_setup_descriptor_pools() indexes dev->descriptor_pools[] using the numa_node forwarded from hctx->numa_node by its single caller, nvme_init_hctx_common(). On a non-NUMA kernel hctx->numa_node is NUMA_NO_NODE (-1). Because the parameter was declared 'unsigned', the value becomes UINT_MAX and the index walks off the array (sized to nr_node_ids), faulting during nvme_alloc_ns() and leaving the namespace without a /dev node. Reproduces on any NVMe controller probed by a CONFIG_NUMA=n kernel: BUG: unable to handle page fault for address: ffff889101603d38 RIP: 0010:nvme_init_hctx_common+0x5a/0x190 [nvme] Call Trace: nvme_init_hctx+0x10/0x20 [nvme] nvme_alloc_ns+0x9e/0xa10 [nvme_core] nvme_scan_ns+0x301/0x3b0 [nvme_core] nvme_scan_ns_async+0x23/0x30 [nvme_core] Switch the parameter to int and fall back to node 0 when it is NUMA_NO_NODE; node 0 is always present.