{"id":"CVE-2025-71312","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix ntfs_mount_options leak in ntfs_fill_super()\n\nIn ntfs_fill_super(), the fc->fs_private pointer is set to NULL without\nfirst freeing the memory it points t…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix ntfs_mount_options leak in ntfs_fill_super()\n\nIn ntfs_fill_super(), the fc->fs_private pointer is set to NULL without\nfirst freeing the memory it points t…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.19, < 6.19.4"],"patched":["linux_kernel 6.19.4"],"published":"2026-05-27","updated":"2026-10-14","sourceUpdated":"2026-10-14T13:10:00.187","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-71312","references":[{"url":"https://git.kernel.org/stable/c/dac871d833b09495198dcac81d2ebaa8db11acbc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f7edab0cee03a1cbe0e55a7bcab8d2d8b6b74278","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00138,"epssPercentile":0.02779,"ingestedAt":"2026-10-14T13:30:58.506Z","slug":"CVE-2025-71312","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix ntfs_mount_options leak in ntfs_fill_super()\n\nIn ntfs_fill_super(), the fc->fs_private pointer is set to NULL without\nfirst freeing the memory it points to. This causes the subsequent call to\nntfs_fs_free() to skip freeing the ntfs_mount_options structure.\n\nThis results in a kmemleak report:\n\n  unreferenced object 0xff1100015378b800 (size 32):\n    comm \"mount\", pid 582, jiffies 4294890685\n    hex dump (first 32 bytes):\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n      00 00 00 00 00 00 00 00 ed ff ed ff 00 04 00 00  ................\n    backtrace (crc ed541d8c):\n      __kmalloc_cache_noprof+0x424/0x5a0\n      __ntfs_init_fs_context+0x47/0x590\n      alloc_fs_context+0x5d8/0x960\n      __x64_sys_fsopen+0xb1/0x190\n      do_syscall_64+0x50/0x1f0\n      entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nThis issue can be reproduced using the following commands:\n        fallocate -l 100M test.file\n        mount test.file /tmp/test\n\nSince sbi->options is duplicated from fc->fs_private and does not\ndirectly use the memory allocated for fs_private, it is unnecessary to\nset fc->fs_private to NULL.\n\nAdditionally, this patch simplifies the code by utilizing the helper\nfunction put_mount_options() instead of open-coding the cleanup logic.\n\n## Affected\n\n- `linux_kernel >= 6.19, < 6.19.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.19.4`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}