{
  "cveId": "CVE-2025-40315",
  "url": "https://patchblox.com/security/cve/CVE-2025-40315",
  "summary": "CVE-2025-40315 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2025-40315, released December 8, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "usb: gadget: f_fs: Fix epfile null pointer access after ep enable.",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  usb: gadget: f_fs: Fix epfile null pointer access after ep enable.  A race condition occurs when ffs_func_eps_enable() runs concurrently with ffs_data_reset(). The ffs_data_clear() called in ffs_data_reset() sets ffs-\u003Eepfiles to NULL before resetting ffs-\u003Eeps_count to 0, leading to a NULL pointer dereference when accessing epfile-\u003Eep in ffs_func_eps_enable() after successful usb_ep_enable().  The ffs-\u003Eepfiles pointer is set to NULL in both ffs_data_clear() and ffs_data_close() functions, and its modification is protected by the spinlock ffs-\u003Eeps_lock. And the whole ffs_func_eps_enable() function is also protected by ffs-\u003Eeps_lock.  Thus, add NULL pointer handling for ffs-\u003Eepfiles in the ffs_func_eps_enable() function to fix issues",
  "published": "2025-12-08T01:16:04Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00216,
  "epssPercentile": 0.12064,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-40315",
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  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}