CVE-2021-39251

A crafted NTFS image can cause a NULL pointer dereference in ntfs_extent_inode_open in NTFS-3G < 2021.8.22.

• CWE-476
• CWE-20
• CWE-476

• http://www.openwall.com/lists/oss-security/2021/08/30/1Mailing List, Third Party Advisory
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988386Issue Tracking, Mailing List, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2001649Issue Tracking, Third Party Advisory
• https://github.com/tuxera/ntfs-3g/releasesRelease Notes, Third Party Advisory
• https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jpThird Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/11/msg00013.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI/
• https://security.gentoo.org/glsa/202301-01Third Party Advisory
• https://www.debian.org/security/2021/dsa-4971Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/08/30/1Mailing List, Third Party Advisory
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988386Issue Tracking, Mailing List, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2001649Issue Tracking, Third Party Advisory
• https://github.com/tuxera/ntfs-3g/releasesRelease Notes, Third Party Advisory
• https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jpThird Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/11/msg00013.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI/
• https://security.gentoo.org/glsa/202301-01Third Party Advisory
• https://www.debian.org/security/2021/dsa-4971Third Party Advisory

Published

Sep 7, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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