{"id":"CVE-2025-71266","summary":"fs: ntfs3: check return value of indx_find to avoid infinite loop","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs: ntfs3: check return value of indx_find to avoid infinite loop\n\nWe found an infinite loop bug in the ntfs3 file system that can lead to a\nDenial-of-Service (DoS) condition.\n\nA malformed dentry in the ntfs3 filesystem can cause the kernel to hang\nduring the lookup operations. By setting the HAS_SUB_NODE flag in an\nINDEX_ENTRY within a directory's INDEX_ALLOCATION block and manipulating the\nVCN pointer, an attacker can cause the indx_find() function to repeatedly\nread the same block, allocating 4 KB of memory each time. The kernel lacks\nVCN loop detection and depth limits, causing memory exhaustion and an OOM\ncrash.\n\nThis patch adds a return value check for fnd_push() to prevent a memory\nexhaustion vulnerability caused by infinite loops. When the index exceeds the\nsize of the fnd-\u003enodes array, fnd_push() returns -EINVAL. The indx_find()\nfunction checks this return value and stops processing, preventing further\nmemory allocation.","modified":"2026-04-02T13:04:59.105656Z","published":"2026-03-18T10:05:02.997Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71266.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0ad7a1be44479503dbe5c699759861ef5b8bd70c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/14c3188afbedfd5178bbabb8002487ea14b37b56"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1732053c8a6b360e2d5afb1b34fe9779398b072c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/398e768d1accd1f5645492ab996005d7aa84a5b0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/435d34719db0e130f6f0c621d67ed524cc1a7d10"},{"type":"WEB","url":"https://git.kernel.org/stable/c/68e32694be231c1cdb99b7637a657314e88e1a96"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b0ea441f44ce64fa514a415d4a9e6e2b06e7946c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71266.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-71266"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"82cae269cfa953032fbb8980a7d554d60fb00b17"},{"fixed":"14c3188afbedfd5178bbabb8002487ea14b37b56"},{"fixed":"435d34719db0e130f6f0c621d67ed524cc1a7d10"},{"fixed":"68e32694be231c1cdb99b7637a657314e88e1a96"},{"fixed":"398e768d1accd1f5645492ab996005d7aa84a5b0"},{"fixed":"b0ea441f44ce64fa514a415d4a9e6e2b06e7946c"},{"fixed":"0ad7a1be44479503dbe5c699759861ef5b8bd70c"},{"fixed":"1732053c8a6b360e2d5afb1b34fe9779398b072c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71266.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.0"},{"fixed":"5.15.202"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.165"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.128"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.75"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71266.json"}}],"schema_version":"1.7.5"}