{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "648f2de053a882c87c05f0060f47d3b11841fdbe"
            },
            {
              "fixed": "d6565ea662e17d45a577184b0011bd69de22dc2b"
            },
            {
              "fixed": "d9d8360cb66e3b599d89d2526e7da8b530ebf2ff"
            },
            {
              "fixed": "5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902"
            },
            {
              "fixed": "378949f46e897204384f3f5f91e42e93e3f87568"
            },
            {
              "fixed": "da40464064599eefe78749f75cd2bba371044c04"
            },
            {
              "fixed": "e83e20b82859f0588e9a52a6fa9fea704a2061cf"
            },
            {
              "fixed": "c23df30915f83e7257c8625b690a1cece94142a0"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.13.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.168"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.131"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.80"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.21"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31467.json"
  },
  "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.",
  "id": "CVE-2026-31467",
  "modified": "2026-07-08T05:38:42.067550544Z",
  "published": "2026-04-22T13:53:56.910Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/378949f46e897204384f3f5f91e42e93e3f87568"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c23df30915f83e7257c8625b690a1cece94142a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6565ea662e17d45a577184b0011bd69de22dc2b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d9d8360cb66e3b599d89d2526e7da8b530ebf2ff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da40464064599eefe78749f75cd2bba371044c04"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e83e20b82859f0588e9a52a6fa9fea704a2061cf"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31467.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31467"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "erofs: add GFP_NOIO in the bio completion if needed"
}