{
  "cveId": "CVE-2025-68339",
  "url": "https://patchblox.com/security/cve/CVE-2025-68339",
  "summary": "CVE-2025-68339 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2025-68339, released December 23, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  atm/fore200e: Fix possible data race in fore200e...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  atm/fore200e: Fix possible data race in fore200e_open()  Protect access to fore200e-\u003Eavailable_cell_rate with rate_mtx lock in the error handling path of fore200e_open() to prevent a data race.  The field fore200e-\u003Eavailable_cell_rate is a shared resource used to track available bandwidth. It is concurrently accessed by fore200e_open(), fore200e_close(), and fore200e_change_qos().  In fore200e_open(), the lock rate_mtx is correctly held when subtracting vcc-\u003Eqos.txtp.max_pcr from available_cell_rate to reserve bandwidth. However, if the subsequent call to fore200e_activate_vcin() fails, the function restores the reserved bandwidth by adding back to available_cell_rate without holding the lock.  This introduces a race condition because available_cell_rate is a global device resource shared across all VCCs. If the error path in fore200e_open() executes concurrently with operations like fore200e_close() or fore200e_change_qos() on other VCCs, a read-modify-write race occurs.  Specifically, the error path reads the rate without the lock. If another CPU acquires the lock and modifies the rate (e.g., releasing bandwidth in fore200e_close()) between this read and the subsequent write, the error path will overwrite the concurrent update with a stale value. This results in incorrect bandwidth accounting.",
  "published": "2025-12-23T14:16:40Z",
  "severity": "",
  "epss": 0.00191,
  "epssPercentile": 0.08806,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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  "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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}