{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "41afaeeda5099d9cd07eaa7dc6c3d20c6f1dd9e9"
            },
            {
              "fixed": "fd7a982657077469802594a5165bc30b9a55af70"
            },
            {
              "fixed": "e9b004ff83067cdf96774b45aea4b239ace99a2f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53319.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-wbt: remove WARN_ON_ONCE from wbt_init_enable_default()\n\nwbt_init_enable_default() uses WARN_ON_ONCE to check for failures from\nwbt_alloc() and wbt_init(). However, both are expected failure paths:\n\n- wbt_alloc() can return NULL under memory pressure (-ENOMEM)\n- wbt_init() can fail with -EBUSY if wbt is already registered\n\nsyzbot triggers this by injecting memory allocation failures during MTD\npartition creation via ioctl(BLKPG), causing a spurious warning.\n\nwbt_init_enable_default() is a best-effort initialization called from\nblk_register_queue() with a void return type. Failure simply means the\ndisk operates without writeback throttling, which is harmless.\n\nReplace WARN_ON_ONCE with plain if-checks, consistent with how\nwbt_set_lat() in the same file already handles these failures. Add a\npr_warn() for the wbt_init() failure to retain diagnostic information\nwithout triggering a full stack trace.",
  "id": "CVE-2026-53319",
  "modified": "2026-07-08T05:35:58.512206752Z",
  "published": "2026-06-26T19:41:11.269Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9b004ff83067cdf96774b45aea4b239ace99a2f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd7a982657077469802594a5165bc30b9a55af70"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53319.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53319"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "blk-wbt: remove WARN_ON_ONCE from wbt_init_enable_default()"
}