{"id":"CVE-2025-71266","state":"PUBLISHED","title":"fs: ntfs3: check return value of indx_find to avoid infinite loop","description":"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->nodes array, fnd_push() returns -EINVAL. The indx_find()\nfunction checks this return value and stops processing, preventing further\nmemory allocation.","publishedAt":"2026-03-18T10:05:02.997Z","updatedAt":"2026-10-15T01:11:20.615Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"14c3188afbedfd5178bbabb8002487ea14b37b56","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"435d34719db0e130f6f0c621d67ed524cc1a7d10","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"68e32694be231c1cdb99b7637a657314e88e1a96","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"398e768d1accd1f5645492ab996005d7aa84a5b0","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"b0ea441f44ce64fa514a415d4a9e6e2b06e7946c","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"0ad7a1be44479503dbe5c699759861ef5b8bd70c","versionType":"git"},{"version":"82cae269cfa953032fbb8980a7d554d60fb00b17","status":"affected","lessThan":"1732053c8a6b360e2d5afb1b34fe9779398b072c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ntfs3/index.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ntfs3/index.c"]}],"references":["https://git.kernel.org/stable/c/14c3188afbedfd5178bbabb8002487ea14b37b56","https://git.kernel.org/stable/c/435d34719db0e130f6f0c621d67ed524cc1a7d10","https://git.kernel.org/stable/c/68e32694be231c1cdb99b7637a657314e88e1a96","https://git.kernel.org/stable/c/398e768d1accd1f5645492ab996005d7aa84a5b0","https://git.kernel.org/stable/c/b0ea441f44ce64fa514a415d4a9e6e2b06e7946c","https://git.kernel.org/stable/c/0ad7a1be44479503dbe5c699759861ef5b8bd70c","https://git.kernel.org/stable/c/1732053c8a6b360e2d5afb1b34fe9779398b072c","https://cert-portal.siemens.com/productcert/html/ssa-082556.html","https://cert-portal.siemens.com/productcert/html/ssa-019113.html","https://cert-portal.siemens.com/productcert/html/ssa-457936.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/71xxx/CVE-2025-71266.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-71266","state":"PUBLISHED","datePublished":"2026-03-18T10:05:02.997Z","dateUpdated":"2026-10-15T01:11:20.615Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-17T09:08:18.457Z"},"containers":{"cna":{"title":"fs: ntfs3: check return value of indx_find to avoid infinite loop","descriptions":[{"lang":"en","value":"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. 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The indx_find()\nfunction checks this return value and stops processing, preventing further\nmemory 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