{"cve":"CVE-2025-71309","nvd":{"published":"2026-05-27T14:16:43.517","modified":"2026-10-14T13:10:00.187","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix deadlock in ni_read_folio_cmpr\n\nSyzbot reported a task hung in ni_readpage_cmpr (now ni_read_folio_cmpr).\nThis is caused by a lock inversion deadlock involving the inode mutex\n(ni_lock) and page locks.\n\nScenario:\n1. Task A enters ntfs_read_folio() for page X. It acquires ni_lock.\n2. Task A calls ni_read_folio_cmpr(), which attempts to lock all pages in\n   the compressed frame (including page Y).\n3. Concurrently, Task B (e.g., via readahead) has locked page Y and\n   calls ntfs_read_folio().\n4. Task B waits for ni_lock (held by A).\n5. Task A waits for page Y lock (held by B).\n   -> DEADLOCK.\n\nThe fix is to restructure locking: do not take ni_lock in ntfs_read_folio().\nInstead, acquire ni_lock inside ni_read_folio_cmpr() ONLY AFTER all required\npage locks for the frame have been successfully acquired. This restores the\ncorrect lock ordering (Page Lock -> ni_lock) consistent with VFS.\n\n[almaz.alexandrovich@paragon-software.com: ni_readpage_cmpr was renamed to ni_read_folio_cmpr]","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-667"],"references":["https://git.kernel.org/stable/c/cfe246b318106e1691bd6c9466c739e8559d25c2","https://git.kernel.org/stable/c/e37a75bb866c29da954b51d0dd7670406246d9ee"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2025-71309","score":0.00106,"percentile":0.01116,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}