{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "89cebc8477290b152618ffa110bbeae340d50900"
            },
            {
              "fixed": "d50b1fd066d66ceb548ba43e332cfe8a47e5e55a"
            },
            {
              "fixed": "d98f22d2e11e0a36493aeb25b2933571ee90d9a4"
            },
            {
              "fixed": "cccbabeb9a18fcb978d76d6047f2b59214aa7749"
            },
            {
              "fixed": "2094dab19d45c487285617b7b68913d0cc0c1211"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.3.0"
            },
            {
              "fixed": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64187.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fail recovery on a committed log item with no regions\n\nIf the first op of a transaction is a bare transaction header\n(len == sizeof(struct xfs_trans_header)), xlog_recover_add_to_trans()\nadds an item but no region, leaving it on r_itemq with ri_cnt == 0 and\nri_buf == NULL.\n\nThe header can be split across op records, so later ops may still add\nregions; the item is only invalid if the transaction commits with none.\nThe runtime commit path never emits such a transaction, so this only\nhappens on a crafted log.  It came from an AI-assisted code audit of the\nrecovery parser.\n\nxlog_recover_reorder_trans() calls ITEM_TYPE() on the item, which reads\n*(unsigned short *)item-\u003eri_buf[0].iov_base and faults on the NULL\nri_buf.  Reject it there, before the commit handlers that also read\nri_buf[0].\n\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:xlog_recover_reorder_trans (fs/xfs/xfs_log_recover.c:1836)\n  xlog_recover_commit_trans (fs/xfs/xfs_log_recover.c:2043)\n  xlog_recover_process_data (fs/xfs/xfs_log_recover.c:2501)\n  xlog_do_recovery_pass (fs/xfs/xfs_log_recover.c:3244)\n  xlog_recover (fs/xfs/xfs_log_recover.c:3493)\n  xfs_log_mount (fs/xfs/xfs_log.c:618)\n  xfs_mountfs (fs/xfs/xfs_mount.c:1034)\n  xfs_fs_fill_super (fs/xfs/xfs_super.c:1938)\n  vfs_get_tree (fs/super.c:1695)\n  path_mount (fs/namespace.c:4161)\n  __x64_sys_mount (fs/namespace.c:4367)",
  "id": "CVE-2026-64187",
  "modified": "2026-07-22T05:29:41.345151026Z",
  "published": "2026-07-20T16:27:46.653Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2094dab19d45c487285617b7b68913d0cc0c1211"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cccbabeb9a18fcb978d76d6047f2b59214aa7749"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d50b1fd066d66ceb548ba43e332cfe8a47e5e55a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d98f22d2e11e0a36493aeb25b2933571ee90d9a4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64187.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64187"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "xfs: fail recovery on a committed log item with no regions"
}