{"cve":"CVE-2021-39257","nvd":{"published":"2021-09-07T15:15:08.110","modified":"2026-06-17T04:03:25.337","status":"Modified","description":"A crafted NTFS image with an unallocated bitmap can lead to a endless recursive function call chain (starting from ntfs_attr_pwrite), causing stack consumption in NTFS-3G < 2021.8.22.","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-674"],"references":["https://github.com/tuxera/ntfs-3g/releases","https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp","https://lists.debian.org/debian-lts-announce/2021/11/msg00013.html","https://security.gentoo.org/glsa/202301-01","https://www.debian.org/security/2021/dsa-4971"],"products":["debian:debian_linux","tuxera:ntfs-3g"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2021-39257","score":0.00396,"percentile":0.33829,"date":"2026-10-31"},"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."]}