{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "75ef7184053989118d3814c558a9af62e7376a58"
            },
            {
              "fixed": "4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc"
            },
            {
              "fixed": "bc3b5e6519b8df22d622a03eab6772784da97db4"
            },
            {
              "fixed": "1017fe1c7f48e511c5a680e3057005daaff2f3a2"
            },
            {
              "fixed": "2ebce860bdd7ae5e13002811bc9bbbf33fcfc221"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.8.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93172.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug\n\nWe miss a failed allocation check for pgdat-\u003eper_cpu_nodestats, which\nresults in a NULL deref when we offset into the per-cpu area.\n\nPropagate -ENOMEM up the stack and leave per_cpu_nodestats pointing\nat boot_nodestats so a later online can retry the allocation.\n\nhotadd_init_pgdat() returns NULL on failure, which __try_online_node()\nalready maps to -ENOMEM.\n\nOn failure nothing needs to be unwound:\n  - the node is never marked online\n  - per_cpu_nodestats is left pointing at boot_nodestats\n  - __add_memory_resource() cleans up pending memblock resources\n  - later online attempts retry the per_cpu_nodestats allocation",
  "id": "CVE-2026-93172",
  "modified": "2026-09-19T03:30:55.607330549Z",
  "published": "2026-09-17T16:12:02.544Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1017fe1c7f48e511c5a680e3057005daaff2f3a2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2ebce860bdd7ae5e13002811bc9bbbf33fcfc221"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc3b5e6519b8df22d622a03eab6772784da97db4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93172.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93172"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug"
}