{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.180-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.96-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.4-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux-6.12"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.100-1~deb12u1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  xfs: fail recovery on a committed log item with no regions  If the first op of a transaction is a bare transaction header (len == sizeof(struct xfs_trans_header)), xlog_recover_add_to_trans() adds an item but no region, leaving it on r_itemq with ri_cnt == 0 and ri_buf == NULL.  The header can be split across op records, so later ops may still add regions; the item is only invalid if the transaction commits with none. The runtime commit path never emits such a transaction, so this only happens on a crafted log.  It came from an AI-assisted code audit of the recovery parser.  xlog_recover_reorder_trans() calls ITEM_TYPE() on the item, which reads *(unsigned short *)item-\u003eri_buf[0].iov_base and faults on the NULL ri_buf.  Reject it there, before the commit handlers that also read ri_buf[0].   KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]  RIP: 0010:xlog_recover_reorder_trans (fs/xfs/xfs_log_recover.c:1836)   xlog_recover_commit_trans (fs/xfs/xfs_log_recover.c:2043)   xlog_recover_process_data (fs/xfs/xfs_log_recover.c:2501)   xlog_do_recovery_pass (fs/xfs/xfs_log_recover.c:3244)   xlog_recover (fs/xfs/xfs_log_recover.c:3493)   xfs_log_mount (fs/xfs/xfs_log.c:618)   xfs_mountfs (fs/xfs/xfs_mount.c:1034)   xfs_fs_fill_super (fs/xfs/xfs_super.c:1938)   vfs_get_tree (fs/super.c:1695)   path_mount (fs/namespace.c:4161)   __x64_sys_mount (fs/namespace.c:4367)",
  "id": "DEBIAN-CVE-2026-64187",
  "modified": "2026-09-14T16:47:48.317493634Z",
  "published": "2026-07-20T17:18:21.743Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-64187"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-64187"
  ]
}