{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.6-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  mm/page_owner: use memcg_data snapshot to avoid TOCTOU in print_page_owner_memcg()  print_page_owner_memcg() reads page-\u003ememcg_data via READ_ONCE() at the start to guard against tail pages and NULL data.  However, it later re-reads page-\u003ememcg_data locklessly in two places:  1: page_memcg_check(page)  2: PageMemcgKmem(page) (via folio_memcg_kmem(), which includes    VM_BUG_ON assertions for tail pages and MEMCG_DATA_OBJEXTS)  If the page is concurrently freed and reallocated as a THP tail page or slab page between these calls, the VM_BUG_ON assertions can trigger on CONFIG_DEBUG_VM=y builds, crashing the kernel.  Fix both TOCTOU issues by using the memcg_data snapshot throughout.",
  "id": "DEBIAN-CVE-2026-93216",
  "modified": "2026-09-25T04:47:29.477790869Z",
  "published": "2026-09-24T16:17:16.670Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-93216"
    }
  ],
  "upstream": [
    "CVE-2026-93216"
  ]
}