{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-multipath: fix flex array size in struct nvme_ns_head\n\nstruct nvme_ns_head contains a flexible array member, current_path[],\nwhich is indexed using the NUMA node ID:\nhead->current_path[numa_node_id()]\n\nThe structure is currently allocated as:\nsize = sizeof(struct nvme_ns_head) +\n (num_possible_nodes() * sizeof(struct nvme_ns *));\nhead = kzalloc(size, GFP_KERNEL);\n\nThis allocation assumes that NUMA node IDs are sequential and densely\npacked from 0 .. num_possible_nodes() - 1. While this assumption holds\non many systems, it is not always true on some architectures such as\npowerpc.\n\nOn some powerpc systems, NUMA node IDs can be sparse. For example:\nNUMA:\n NUMA node(s): 6\n NUMA node0 CPU(s): 80-159\n NUMA node8 CPU(s): 0-79\n NUMA node252 CPU(s):\n NUMA node253 CPU(s):\n NUMA node254 CPU(s):\n NUMA node255 CPU(s):\n\nThat is, the possible/online NUMA node IDs are: 0, 8, 252, 253, 254, 255\nIn this case: num_possible_nodes() = 6\n\nSo memory is allocated for only 6 entries in current_path[]. However,\nthe array is later indexed using the actual NUMA node ID. As a result,\naccesses such as:\nhead->current_path[8] or\nhead->current_path[252]\ngoes out of bounds, leading to the following KASAN splat:\n\n==================================================================\nBUG: KASAN: slab-out-of-bounds in nvme_mpath_revalidate_paths+0x22c/0x290 [nvme_core]\nWrite of size 8 at addr c00020003bda35b8 by task kworker/u641:2/1997\n\nCPU: 1 UID: 0 PID: 1997 Comm: kworker/u641:2 Not tainted 7.1.0-rc5-dirty #14 PREEMPT(lazy)\nHardware name: 8335-GTH POWER9 0x4e1202 opal:skiboot-v6.5.3-35-g1851b2a06 PowerNV\nWorkqueue: async async_run_entry_fn\nCall Trace:\n[c000200037fa7510] [c0000000021c23d4] dump_stack_lvl+0x88/0xdc (unreliable)\n[c000200037fa7540] [c0000000009fda90] print_report+0x22c/0x67c\n[c000200037fa7630] [c0000000009fd508] kasan_report+0x108/0x220\n[c000200037fa7740] [c0000000009fff48] __asan_store8+0xe8/0x120\n[c000200037fa7760] [c008000018e76474] nvme_mpath_revalidate_paths+0x22c/0x290 [nvme_core]\n[c000200037fa7800] [c008000018e6556c] nvme_update_ns_info+0x4a4/0x5e0 [nvme_core]\n[c000200037fa7a50] [c008000018e66270] nvme_alloc_ns+0x6d8/0x1a70 [nvme_core]\n[c000200037fa7c20] [c008000018e679fc] nvme_scan_ns+0x3f4/0x630 [nvme_core]\n[c000200037fa7d10] [c00000000031f22c] async_run_entry_fn+0x9c/0x3a0\n[c000200037fa7db0] [c0000000002fa544] process_one_work+0x414/0xa10\n[c000200037fa7ec0] [c0000000002fbf00] worker_thread+0x320/0x640\n[c000200037fa7f80] [c00000000030d0f8] kthread+0x278/0x290\n[c000200037fa7fe0] [c00000000000ded8] start_kernel_thread+0x14/0x18\n\nAllocated by task 1997 on cpu 1 at 35.928317s:\n\nThe buggy address belongs to the object at c00020003bda3000\n which belongs to the cache kmalloc-rnd-15-2k of size 2048\nThe buggy address is located 16 bytes to the right of\n allocated 1448-byte region [c00020003bda3000, c00020003bda35a8)\n\nThe buggy address belongs to the physical page:\n\nMemory state around the buggy address:\n c00020003bda3480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n c00020003bda3500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n>c00020003bda3580: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc\n ^\n c00020003bda3600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n c00020003bda3680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n==================================================================\n\nFix this by allocating the flexible array using nr_node_ids instead\nof num_possible_nodes(). Since nr_node_ids represents the maximum\npossible NUMA node IDs, indexing current_path[] using numa_node_id()\nbecomes safe even on systems with sparse node IDs.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74384" }, { "summary":"CVE-2026-74384 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-74384.json" }, { "summary":"openEuler-SA-2026-3706", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3706" }, { "summary":"CVE-2026-74384", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-74384&packageName=kernel" } ], "title":"openEuler cve CVE-2026-74384", "tracking":{ "initial_release_date":"2026-09-16T18:03:41+08:00", "revision_history":[ { "date":"2026-09-16T18:03:41+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-09-16T18:03:41+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-09-16T18:03:41+08:00", "id":"CVE-2026-74384", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"openEuler-22.03-LTS-SP4", "name":"openEuler-22.03-LTS-SP4" }, "name":"openEuler-22.03-LTS-SP4", "category":"product_version" } ], "category":"product_name" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"bpftool-5.10.0-332.0.0.233.oe2203sp4.aarch64.rpm", "name":"bpftool-5.10.0-332.0.0.233.oe2203sp4.aarch64.rpm" }, "name":"bpftool-5.10.0-332.0.0.233.oe2203sp4.aarch64.rpm", 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"category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-74384", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-multipath: fix flex array size in struct nvme_ns_head\n\nstruct nvme_ns_head contains a flexible array member, current_path[],\nwhich is indexed using the NUMA node ID:\nhead->current_path[numa_node_id()]\n\nThe structure is currently allocated as:\nsize = sizeof(struct nvme_ns_head) +\n (num_possible_nodes() * sizeof(struct nvme_ns *));\nhead = kzalloc(size, GFP_KERNEL);\n\nThis allocation assumes that NUMA node IDs are sequential and densely\npacked from 0 .. num_possible_nodes() - 1. While this assumption holds\non many systems, it is not always true on some architectures such as\npowerpc.\n\nOn some powerpc systems, NUMA node IDs can be sparse. For example:\nNUMA:\n NUMA node(s): 6\n NUMA node0 CPU(s): 80-159\n NUMA node8 CPU(s): 0-79\n NUMA node252 CPU(s):\n NUMA node253 CPU(s):\n NUMA node254 CPU(s):\n NUMA node255 CPU(s):\n\nThat is, the possible/online NUMA node IDs are: 0, 8, 252, 253, 254, 255\nIn this case: num_possible_nodes() = 6\n\nSo memory is allocated for only 6 entries in current_path[]. However,\nthe array is later indexed using the actual NUMA node ID. As a result,\naccesses such as:\nhead->current_path[8] or\nhead->current_path[252]\ngoes out of bounds, leading to the following KASAN splat:\n\n==================================================================\nBUG: KASAN: slab-out-of-bounds in nvme_mpath_revalidate_paths+0x22c/0x290 [nvme_core]\nWrite of size 8 at addr c00020003bda35b8 by task kworker/u641:2/1997\n\nCPU: 1 UID: 0 PID: 1997 Comm: kworker/u641:2 Not tainted 7.1.0-rc5-dirty #14 PREEMPT(lazy)\nHardware name: 8335-GTH POWER9 0x4e1202 opal:skiboot-v6.5.3-35-g1851b2a06 PowerNV\nWorkqueue: async async_run_entry_fn\nCall Trace:\n[c000200037fa7510] [c0000000021c23d4] dump_stack_lvl+0x88/0xdc (unreliable)\n[c000200037fa7540] [c0000000009fda90] print_report+0x22c/0x67c\n[c000200037fa7630] [c0000000009fd508] kasan_report+0x108/0x220\n[c000200037fa7740] [c0000000009fff48] __asan_store8+0xe8/0x120\n[c000200037fa7760] [c008000018e76474] nvme_mpath_revalidate_paths+0x22c/0x290 [nvme_core]\n[c000200037fa7800] [c008000018e6556c] nvme_update_ns_info+0x4a4/0x5e0 [nvme_core]\n[c000200037fa7a50] [c008000018e66270] nvme_alloc_ns+0x6d8/0x1a70 [nvme_core]\n[c000200037fa7c20] [c008000018e679fc] nvme_scan_ns+0x3f4/0x630 [nvme_core]\n[c000200037fa7d10] [c00000000031f22c] async_run_entry_fn+0x9c/0x3a0\n[c000200037fa7db0] [c0000000002fa544] process_one_work+0x414/0xa10\n[c000200037fa7ec0] [c0000000002fbf00] worker_thread+0x320/0x640\n[c000200037fa7f80] [c00000000030d0f8] kthread+0x278/0x290\n[c000200037fa7fe0] [c00000000000ded8] start_kernel_thread+0x14/0x18\n\nAllocated by task 1997 on cpu 1 at 35.928317s:\n\nThe buggy address belongs to the object at c00020003bda3000\n which belongs to the cache kmalloc-rnd-15-2k of size 2048\nThe buggy address is located 16 bytes to the right of\n allocated 1448-byte region [c00020003bda3000, c00020003bda35a8)\n\nThe buggy address belongs to the physical page:\n\nMemory state around the buggy address:\n c00020003bda3480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n c00020003bda3500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n>c00020003bda3580: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc\n ^\n c00020003bda3600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n c00020003bda3680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n==================================================================\n\nFix this by allocating the flexible array using nr_node_ids instead\nof num_possible_nodes(). Since nr_node_ids represents the maximum\npossible NUMA node IDs, indexing current_path[] using numa_node_id()\nbecomes safe even on systems with sparse node IDs.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-22.03-LTS-SP4:bpftool-5.10.0-332.0.0.233.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:bpftool-debuginfo-5.10.0-332.0.0.233.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-5.10.0-332.0.0.233.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-debuginfo-5.10.0-332.0.0.233.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-debugsource-5.10.0-332.0.0.233.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-devel-5.10.0-332.0.0.233.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-headers-5.10.0-332.0.0.233.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-source-5.10.0-332.0.0.233.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:kernel-tools-5.10.0-332.0.0.233.oe2203sp4.aarch64", 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"openEuler-22.03-LTS-SP4:perf-debuginfo-5.10.0-332.0.0.233.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:python3-perf-5.10.0-332.0.0.233.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:python3-perf-debuginfo-5.10.0-332.0.0.233.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:kernel-5.10.0-332.0.0.233.oe2203sp4.src" ] } ], "threats":[ { "details":"Critical", "category":"impact" } ], "title":"CVE-2026-74384" } ] }