{ "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-2026-64164", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64164", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-07-19T15:40:49.894Z", "updatedAt": "2026-07-19T15:40:49.894Z", "importedAt": "2026-10-24T01:58:25.636Z", "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": "btrfs: tracepoints: fix sleep while in atomic context in btrfs_sync_file()", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: tracepoints: fix sleep while in atomic context in btrfs_sync_file()\n\nThe trace event btrfs_sync_file() is called in an atomic context (all trace\nevents are) and its call to dput(), which is needed due to the call to\ndget_parent(), can sleep, triggering a kernel splat.\n\nThis can be reproduced by enabling the trace event and running btrfs/056\nfrom fstests for example. The splat shown in dmesg is the following:\n\n [53.919] BUG: sleeping function called from invalid context at fs/dcache.c:970\n [53.947] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 32773, name: xfs_io\n [53.988] preempt_count: 2, expected: 0\n [53.967] RCU nest depth: 0, expected: 0\n [53.943] Preemption disabled at:\n [53.944] [<0000000000000000>] 0x0\n [54.078] CPU: 0 UID: 0 PID: 32773 Comm: xfs_io Tainted: G W 7.1.0-rc1-btrfs-next-232+ #1 PREEMPT(full)\n [54.070] Tainted: [W]=WARN\n [54.071] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-0-gea1b7a073390-prebuilt.qemu.org 04/01/2014\n [54.072] Call Trace:\n [54.074] \n [54.076] dump_stack_lvl+0x56/0x80\n [54.079] __might_resched.cold+0xd6/0x10f\n [54.072] dput.part.0+0x24/0x110\n [54.078] trace_event_raw_event_btrfs_sync_file+0x75/0x140 [btrfs]\n [54.089] btrfs_sync_file+0x1ed/0x530 [btrfs]\n [54.087] ? __handle_mm_fault+0x8ae/0xed0\n [54.089] btrfs_do_write_iter+0x172/0x210 [btrfs]\n [54.091] vfs_write+0x21f/0x450\n [54.094] __x64_sys_pwrite64+0x8d/0xc0\n [54.096] ? do_user_addr_fault+0x20c/0x670\n [54.099] do_syscall_64+0x60/0xf20\n [54.092] ? clear_bhb_loop+0x60/0xb0\n [54.094] entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nSo stop using dget_parent() and dput() and access the parent dentry\ndirectly as dentry->d_parent. This is also what ext4 is doing in\nits equivalent trace event ext4_sync_file_enter().", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "4a7bab35fad5251c8cb738161152578cd83b6b9c", "status": "affected", "versionType": "git", "lessThan": "d78b0a80eac36879ef5478707135c446920e134b" }, { "version": "520e8b4bcf872a534a7bf61ccf880047642df296", "status": "affected", "versionType": "git", "lessThan": "4361954f0e158af0530caa1e57f12b531be4658f" }, { "version": "e252db8ca2a01f82d472091f35d549b313278636", "status": "affected", "versionType": "git", "lessThan": "6279992c9ba2774901c9d4dd4a481162e2534714" }, { "version": "c09a7446aab5773f38d6abb25fce99b8e1dfbc97", "status": "affected", "versionType": "git", "lessThan": "26b2290baaf6da6add0f782a100766e686a33f4f" }, { "version": "32372781d664a9b03c40343e96c29d0a6139f97d", "status": "affected", "versionType": "git", "lessThan": "12a0487945c09760a5968d9333383014ea294117" }, { "version": "2e4adfaec97ee053ad1bdfb5036845e66f7e0d8a", "status": "affected", "versionType": "git", "lessThan": "c32a7e0e3c73c1c0768556a56bd78de9f7b83780" }, { "version": "a85b46db143fda5869e7d8df8f258ccef5fa1719", "status": "affected", "versionType": "git", "lessThan": "0a96d9a85cd2240481297156b9bb72e10b7a8036" }, { "version": "a85b46db143fda5869e7d8df8f258ccef5fa1719", "status": "affected", "versionType": "git", "lessThan": "c73370c677646e86fc4b1780fb07027bdf847375" }, { "version": "d110d7cdb045715c0b45b0dfd974525bb38f653d", "status": "affected", "versionType": "git" }, { "version": "6.6.136", "status": "affected", "versionType": "semver", "lessThan": "6.6.142" }, { "version": "6.12.83", "status": "affected", "versionType": "semver", "lessThan": "6.12.92" }, { "version": "6.18.24", "status": "affected", "versionType": "semver", "lessThan": "6.18.34" }, { "version": "6.19.14", "status": "affected", "versionType": "semver", "lessThan": "6.20" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "7.0", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "7.0" }, { "version": "6.6.142", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.92", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.34", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.0.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.0.*" }, { "version": "7.1", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }