{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1d18c47c735e8adfe531fc41fae31e98f86b68fe"
            },
            {
              "fixed": "08d931a0a850ad16a64f2cd23a19f40795cdbdf7"
            },
            {
              "fixed": "b28fe65a36b8209b6adcf2722c7ce974cf9ac8d1"
            },
            {
              "fixed": "68cbd70795dd8c06e7ccdc4eb0b74c5b180076c3"
            },
            {
              "fixed": "0f05d95b99164a9ccc4cf4a4920e0ff0228138ad"
            },
            {
              "fixed": "a77644d009dece1104b6fcc6e322b0e4503db0d6"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.7.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93239.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mm: Fix the lockless page-table walk in show_pte()\n\nshow_pte() walks page tables locklessly and can run with interrupts\nenabled. A concurrent teardown can free a table page while it is being\nwalked. It can also clear a parent entry after show_pte() checked it; the\nregular pXd_offset() helpers then reread the cleared entry and can derive a\nbogus lower-level pointer and fault again.\n\nUse the lockless offset helpers with the saved parent entries, as\ngup_fast() does, and pass the saved PMD to pte_offset_map().\n\nFor task page tables, arm64 selects MMU_GATHER_RCU_TABLE_FREE. Disable\nlocal interrupts around the walk to hold off RCU-deferred table frees and\nblock the tlb_remove_table_sync_one() IPI until the walk is finished.\n\nPlace the IRQ guard after the header print. This does not make the output a\nconsistent snapshot, but prevents the task page-table walk from\ndereferencing a released table page or deriving a pointer from a different\nparent value.",
  "id": "CVE-2026-93239",
  "modified": "2026-09-26T03:30:27.057543840Z",
  "published": "2026-09-24T15:34:27.219Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08d931a0a850ad16a64f2cd23a19f40795cdbdf7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f05d95b99164a9ccc4cf4a4920e0ff0228138ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/68cbd70795dd8c06e7ccdc4eb0b74c5b180076c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a77644d009dece1104b6fcc6e322b0e4503db0d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b28fe65a36b8209b6adcf2722c7ce974cf9ac8d1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93239.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93239"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "arm64: mm: Fix the lockless page-table walk in show_pte()"
}