{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-31467",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-31467"
  ],
  "published": "2026-04-22T13:57:42Z",
  "summary": "erofs: add GFP_NOIO in the bio completion if needed",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: add GFP_NOIO in the bio completion if needed\n\nThe bio completion path in the process context (e.g. dm-verity)\nwill directly call into decompression rather than trigger another\nworkqueue context for minimal scheduling latencies, which can\nthen call vm_map_ram() with GFP_KERNEL.\n\nDue to insufficient memory, vm_map_ram() may generate memory\nswapping I/O, which can cause submit_bio_wait to deadlock\nin some scenarios.\n\nTrimmed down the call stack, as follows:\n\nf2fs_submit_read_io\n  submit_bio                      //bio_list is initialized.\n    mmc_blk_mq_recovery\n      z_erofs_endio\n        vm_map_ram\n          __pte_alloc_kernel\n            __alloc_pages_direct_reclaim\n              shrink_folio_list\n                __swap_writepage\n                  submit_bio_wait  //bio_list is non-NULL, hang!!!\n\nUse memalloc_noio_{save,restore}() to wrap up this path.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-31467"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d6565ea662e17d45a577184b0011bd69de22dc2b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d9d8360cb66e3b599d89d2526e7da8b530ebf2ff"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/378949f46e897204384f3f5f91e42e93e3f87568"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/da40464064599eefe78749f75cd2bba371044c04"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e83e20b82859f0588e9a52a6fa9fea704a2061cf"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c23df30915f83e7257c8625b690a1cece94142a0"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T13:16:28Z"
  }
}