{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d7242af8643409aae32243450341ef25b28d8a8c"
            },
            {
              "fixed": "05b4ed8bef30bba4f559c8d835e2dd20c48cf8a4"
            },
            {
              "fixed": "a6d57efeaae3f3b3656514f600eac96be713d90e"
            },
            {
              "fixed": "620b46ed6ae17c8438d889c8c0cfddab36a1476c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.18.0"
            },
            {
              "fixed": "6.18.27"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46035.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/page_alloc: return NULL early from alloc_frozen_pages_nolock() in NMI on UP\n\nOn UP kernels (!CONFIG_SMP), spin_trylock() is a no-op that\nunconditionally succeeds even when the lock is already held. As a\nresult, alloc_frozen_pages_nolock() called from NMI context can\nre-enter rmqueue() and acquire the zone lock that the interrupted\ncontext is already holding, corrupting the freelists.\n\nWith CONFIG_DEBUG_SPINLOCK on UP, the following BUG is triggered with\nthe slub_kunit test module:\n\n  BUG: spinlock trylock failure on UP on CPU#0, kunit_try_catch/243\n  [...]\n  Call Trace:\n   \u003cNMI\u003e\n   dump_stack_lvl+0x3f/0x60\n   do_raw_spin_trylock+0x41/0x50\n   _raw_spin_trylock+0x24/0x50\n   rmqueue.isra.0+0x2a9/0xa70\n   get_page_from_freelist+0xeb/0x450\n   alloc_frozen_pages_nolock_noprof+0x111/0x1e0\n   allocate_slab+0x42a/0x500\n   ___slab_alloc+0xa7/0x4c0\n   kmalloc_nolock_noprof+0x164/0x310\n   [...]\n   \u003c/NMI\u003e\n\nFix this by returning NULL early when invoked from NMI on a UP kernel.",
  "id": "CVE-2026-46035",
  "modified": "2026-07-15T01:49:14.522924164Z",
  "published": "2026-05-27T12:56:44.260Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05b4ed8bef30bba4f559c8d835e2dd20c48cf8a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/620b46ed6ae17c8438d889c8c0cfddab36a1476c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6d57efeaae3f3b3656514f600eac96be713d90e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46035.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46035"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "mm/page_alloc: return NULL early from alloc_frozen_pages_nolock() in NMI on UP"
}