{
  "cveId": "CVE-2025-40196",
  "url": "https://patchblox.com/security/cve/CVE-2025-40196",
  "summary": "CVE-2025-40196 is fixed in 35 products on 1 platform, first by DEBIAN-CVE-2025-40196, released November 12, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  fs: quota: create dedicated workqueue for quota_...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fs: quota: create dedicated workqueue for quota_release_work  There is a kernel panic due to WARN_ONCE when panic_on_warn is set.  This issue occurs when writeback is triggered due to sync call for an opened file(ie, writeback reason is WB_REASON_SYNC). When f2fs balance is needed at sync path, flush for quota_release_work is triggered. By default quota_release_work is queued to \u0022events_unbound\u0022 queue which does not have WQ_MEM_RECLAIM flag. During f2fs balance \u0022writeback\u0022 workqueue tries to flush quota_release_work causing kernel panic due to MEM_RECLAIM flag mismatch errors.  This patch creates dedicated workqueue with WQ_MEM_RECLAIM flag for work quota_release_work.  ------------[ cut here ]------------ WARNING: CPU: 4 PID: 14867 at kernel/workqueue.c:3721 check_flush_dependency\u002B0x13c/0x148 Call trace:  check_flush_dependency\u002B0x13c/0x148  __flush_work\u002B0xd0/0x398  flush_delayed_work\u002B0x44/0x5c  dquot_writeback_dquots\u002B0x54/0x318  f2fs_do_quota_sync\u002B0xb8/0x1a8  f2fs_write_checkpoint\u002B0x3cc/0x99c  f2fs_gc\u002B0x190/0x750  f2fs_balance_fs\u002B0x110/0x168  f2fs_write_single_data_page\u002B0x474/0x7dc  f2fs_write_data_pages\u002B0x7d0/0xd0c  do_writepages\u002B0xe0/0x2f4  __writeback_single_inode\u002B0x44/0x4ac  writeback_sb_inodes\u002B0x30c/0x538  wb_writeback\u002B0xf4/0x440  wb_workfn\u002B0x128/0x5d4  process_scheduled_works\u002B0x1c4/0x45c  worker_thread\u002B0x32c/0x3e8  kthread\u002B0x11c/0x1b0  ret_from_fork\u002B0x10/0x20 Kernel panic - not syncing: kernel: panic_on_warn set ...",
  "published": "2025-11-12T22:15:46Z",
  "severity": "important",
  "epss": 0.00206,
  "epssPercentile": 0.10804,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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