iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE)

{
  "id": "fcf9e5419d474d965760709f2f90afe89c8d9bbfd6560dd502e7741b4205cbf3",
  "url": "https://osv.dev/vulnerability/CVE-2022-50093",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE)",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE) KASAN reports: [ 4.668325][ T0] BUG: KASAN: wild-memory-access in dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497) [ 4.676149][ T0] Read of size 8 at addr 1fffffff85115558 by task swapper/0/0 [ 4.683454][ T0] [ 4.685638][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc3-00004-g0e862838f290 #1 [ 4.694331][ T0] Hardware name: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 03/02/2016 [ 4.703196][ T0] Call Trace: [ 4.706334][ T0] [ 4.709133][ T0] ? dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497) after converting the type of the first argument (@nr, bit number) of arch_test_bit() from `long` to `unsigned long`[0]. Under certain conditions (for example, when ACPI NUMA is disabled via command line), pxm_to_node() can return %NUMA_NO_NODE (-1). It is valid 'magic' number of NUMA node, but not valid bit number to use in bitops. node_online() eventually descends to test_bit() without checking for the input, assuming it's on caller side (which might be good for perf-critical tasks). There, -1 becomes %ULONG_MAX which leads to a",
    "evidence": "osv:CVE-2022-50093",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.211",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.137",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.61",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.18.18",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.19.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50093",
      "aliases": [
        "CVE-2022-50093"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ee34b32d8c2950f66038c8975747ef9aec855289"
                },
                {
                  "fixed": "b12304984654d8e58a2b22ff94c4410906d6267f"
                },
                {
                  "fixed": "5659efdadf04b56707d58c1b758df16d2e0eff2c"
                },
                {
                  "fixed": "0b4c0003aeda32a600f95df53b2848da8a5aa3fa"
                },
                {
                  "fixed": "73ce2046e04ad488cecc66757c36cbe1bdf089d4"
                },
                {
                  "fixed": "c2304c50f4d94f56c2e326f25c9dc8cf2ba6f5fa"
                },
                {
                  "fixed": "b0b0b77ea611e3088e9523e60860f4f41b62b235"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50093.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.33"
                },
                {
                  "fixed": "5.4.211"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.137"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.61"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.18.18"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.19.0"
                },
                {
                  "fixed": "5.19.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50093.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.080855382Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0b4c0003aeda32a600f95df53b2848da8a5aa3fa",
        "https://git.kernel.org/stable/c/5659efdadf04b56707d58c1b758df16d2e0eff2c",
        "https://git.kernel.org/stable/c/73ce2046e04ad488cecc66757c36cbe1bdf089d4",
        "https://git.kernel.org/stable/c/b0b0b77ea611e3088e9523e60860f4f41b62b235",
        "https://git.kernel.org/stable/c/b12304984654d8e58a2b22ff94c4410906d6267f",
        "https://git.kernel.org/stable/c/c2304c50f4d94f56c2e326f25c9dc8cf2ba6f5fa",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50093.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50093",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50093.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50093",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 515891,
  "published_at": "2025-06-18T11:02:31.966+00:00"
}