{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-40196", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40196", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-11-12T21:56:32.578Z", "updatedAt": "2026-10-15T01:09:02.842Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "fs: quota: create dedicated workqueue for quota_release_work", "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 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 ...", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "3e6ff207cd5bd924ad94cd1a7c633bcdac0ba1cb", "status": "affected", "versionType": "git", "lessThan": "8df2eedd371a1c24ecc4283581299d7737dfcd06" }, { "version": "bcacb52a985f1b6d280f698a470b873dfe52728a", "status": "affected", "versionType": "git", "lessThan": "f846eacde280ecc3daedfe001580e3033565179e" }, { "version": "8ea87e34792258825d290f4dc5216276e91cb224", "status": "affected", "versionType": "git", "lessThan": "f12039df1515d5daf7d92e586ece5cefeb39561b" }, { "version": "ac6f420291b3fee1113f21d612fa88b628afab5b", "status": "affected", "versionType": "git", "lessThan": "8a09a62f0c8c6123c2f1864ed6d5f9eb144afaf0" }, { "version": "ac6f420291b3fee1113f21d612fa88b628afab5b", "status": "affected", "versionType": "git", "lessThan": "72b7ceca857f38a8ca7c5629feffc63769638974" }, { "version": "a5abba5e0e586e258ded3e798fe5f69c66fec198", "status": "affected", "versionType": "git" }, { "version": "6f3821acd7c3143145999248087de5fb4b48cf26", "status": "affected", "versionType": "git" }, { "version": "ab6cfcf8ed2c7496f55d020b65b1d8cd55d9a2cb", "status": "affected", "versionType": "git" }, { "version": "6.1.120", "status": "affected", "versionType": "semver", "lessThan": "6.1.178" }, { "version": "6.6.64", "status": "affected", "versionType": "semver", "lessThan": "6.6.114" }, { "version": "6.12.4", "status": "affected", "versionType": "semver", "lessThan": "6.12.54" }, { "version": "5.4.287", "status": "affected", "versionType": "semver", "lessThan": "5.5" }, { "version": "5.10.231", "status": "affected", "versionType": "semver", "lessThan": "5.11" }, { "version": "5.15.174", "status": "affected", "versionType": "semver", "lessThan": "5.16" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.13", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.13" }, { "version": "6.1.178", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.114", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.54", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.17.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.17.*" }, { "version": "6.18", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }