{"identifier":"CVE-2026-99242","cve":{"id":"CVE-2026-99242","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: fix race between fallocate and mmap reads\n\nThe fallocate implementation only takes invalidate_lock for punch hole,\ncollapse range, and insert range operations. For standard allocation modes\n(mode == 0, FALLOC_FL_KEEP_SIZE), the lock is not held.\n\nDuring ntfs_attr_fallocate(), new clusters are mapped to the runlist via\nntfs_attr_map_cluster() before being zeroed by ntfs_dio_zero_range(). This\ncreates a window where concurrent mmap page faults can read uninitialized\ndisk data.\n\nSince mmap uses filemap_fault() which takes invalidate_lock in shared mode,\nit can fault in pages during this window and expose old disk contents to\nuserspace. This is an information leak and data integrity issue.\n\nFix by taking invalidate_lock for all fallocate operations, not just for\npunch/collapse/insert modes. This prevents concurrent page faults from\naccessing unzeroed clusters during the allocation window.","published":"2026-11-02T16:17:50.040000+00:00","modified":"2026-11-02T16:17:50.040000+00:00","status":"Received","score":null,"severity":"UNSCORED","vector":"","cvss_version":"","affected":[],"weaknesses":[],"references":[{"url":"https://git.kernel.org/stable/c/67aded1da114dc44808315f249bd9e7e440f799d","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7dd1c2fec6ebdd1a88a02cb58ff515a258eeb327","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"kev":null,"kev_checked":true,"metrics":{},"configurations":[],"source":"nvd","retrieved_at":"2026-11-02T19:29:46.260077+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence.","Fresh EPSS data is unavailable; missing values are not zero."]},"epss":null,"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"git.kernel.org","source_url":"https://git.kernel.org/stable/c/67aded1da114dc44808315f249bd9e7e440f799d","investigate_url":"https://investigate.aeglixmind.com/#git.kernel.org"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-99242","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-99242","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-99242","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}