{"id":"CVE-2025-40196","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs: quota: create dedicated workqueue for quota_release_work\n\nThere is a kernel panic due to WARN_ONCE when panic_on_warn is set.\n\nThis issue occurs when writeback is t…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs: quota: create dedicated workqueue for quota_release_work\n\nThere is a kernel panic due to WARN_ONCE when panic_on_warn is set.\n\nThis issue occurs when writeback is t…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 3e6ff207cd5bd924ad94cd1a7c633bcdac0ba1cb < 8df2eedd371a1c24ecc4283581299d7737dfcd06","Linux >= bcacb52a985f1b6d280f698a470b873dfe52728a < f846eacde280ecc3daedfe001580e3033565179e","Linux >= 8ea87e34792258825d290f4dc5216276e91cb224 < f12039df1515d5daf7d92e586ece5cefeb39561b","Linux >= ac6f420291b3fee1113f21d612fa88b628afab5b < 8a09a62f0c8c6123c2f1864ed6d5f9eb144afaf0","Linux >= ac6f420291b3fee1113f21d612fa88b628afab5b < 72b7ceca857f38a8ca7c5629feffc63769638974","Linux a5abba5e0e586e258ded3e798fe5f69c66fec198","Linux 6f3821acd7c3143145999248087de5fb4b48cf26","Linux ab6cfcf8ed2c7496f55d020b65b1d8cd55d9a2cb","Linux >= 6.1.120 < 6.1.178","Linux >= 6.6.64 < 6.6.114","Linux >= 6.12.4 < 6.12.54","Linux >= 5.4.287 < 5.5","Linux >= 5.10.231 < 5.11","Linux >= 5.15.174 < 5.16","Linux 6.13"],"published":"2025-11-12","updated":"2026-09-08","sourceUpdated":"2026-09-08T09:17:36.077","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-40196","references":[{"url":"https://git.kernel.org/stable/c/72b7ceca857f38a8ca7c5629feffc63769638974","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8a09a62f0c8c6123c2f1864ed6d5f9eb144afaf0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8df2eedd371a1c24ecc4283581299d7737dfcd06","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f12039df1515d5daf7d92e586ece5cefeb39561b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f846eacde280ecc3daedfe001580e3033565179e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00193,"epssPercentile":0.09199,"ingestedAt":"2026-07-24T15:30:58.029Z","slug":"CVE-2025-40196","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nfs: quota: create dedicated workqueue for quota_release_work\n\nThere is a kernel panic due to WARN_ONCE when panic_on_warn is set.\n\nThis issue occurs when writeback is triggered due to sync call for an\nopened file(ie, writeback reason is WB_REASON_SYNC). When f2fs balance\nis needed at sync path, flush for quota_release_work is triggered.\nBy default quota_release_work is queued to \"events_unbound\" queue which\ndoes not have WQ_MEM_RECLAIM flag. During f2fs balance \"writeback\"\nworkqueue tries to flush quota_release_work causing kernel panic due to\nMEM_RECLAIM flag mismatch errors.\n\nThis patch creates dedicated workqueue with WQ_MEM_RECLAIM flag\nfor work quota_release_work.\n\n------------[ cut here ]------------\nWARNING: CPU: 4 PID: 14867 at kernel/workqueue.c:3721 check_flush_dependency+0x13c/0x148\nCall trace:\n check_flush_dependency+0x13c/0x148\n __flush_work+0xd0/0x398\n flush_delayed_work+0x44/0x5c\n dquot_writeback_dquots+0x54/0x318\n f2fs_do_quota_sync+0xb8/0x1a8\n f2fs_write_checkpoint+0x3cc/0x99c\n f2fs_gc+0x190/0x750\n f2fs_balance_fs+0x110/0x168\n f2fs_write_single_data_page+0x474/0x7dc\n f2fs_write_data_pages+0x7d0/0xd0c\n do_writepages+0xe0/0x2f4\n __writeback_single_inode+0x44/0x4ac\n writeback_sb_inodes+0x30c/0x538\n wb_writeback+0xf4/0x440\n wb_workfn+0x128/0x5d4\n process_scheduled_works+0x1c4/0x45c\n worker_thread+0x32c/0x3e8\n kthread+0x11c/0x1b0\n ret_from_fork+0x10/0x20\nKernel panic - not syncing: kernel: panic_on_warn set ...\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}