CVE-2021-33286
In NTFS-3G versions < 2021.8.22, when a specially crafted unicode string is supplied in an NTFS image a heap buffer overflow can occur and allow for code execution.
02 Description
In NTFS-3G versions < 2021.8.22, when a specially crafted unicode string is supplied in an NTFS image a heap buffer overflow can occur and allow for code execution.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.46% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 39.7% of scored records. A rank, not a probability.
- NVD base score
- 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-07-09.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-09-07 00:00Z5 YR AGO
- Last updated
- 2026-07-09 00:13Z3 MO AGO
- Reserved
- 2021-05-20
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.2
- Document digest
- 492ea4b16f1e2fa37ac9c950a1636864854c8122c631e40d851a94ef1015602d
05 Affected products
06 References
- www.openwall.com[oss-security] 20210830 NTFS3G-SA-2021-0001: Multiple buffer overflows in all versions of NTFS-3Ghttp://www.openwall.com/lists/oss-security/2021/08/30/1
- github.comhttps://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp
- www.debian.orgDSA-4971https://www.debian.org/security/2021/dsa-4971
- lists.debian.org[debian-lts-announce] 20211116 [SECURITY] [DLA 2819-1] ntfs-3g security updatehttps://lists.debian.org/debian-lts-announce/2021/11/msg00013.html
- security.gentoo.orgGLSA-202301-01https://security.gentoo.org/glsa/202301-01
07 Fixed in
AlmaLinux 8
- SLOF Fixed in 20210217-1.module_el8.6.0+2880+7d9e3703
- hivex Fixed in 1.3.18-23.module_el8.6.0+2880+7d9e3703
- hivex-devel Fixed in 1.3.18-23.module_el8.6.0+2880+7d9e3703
- libguestfs Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-appliance Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-bash-completion Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-devel Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-gfs2 Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-gobject Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-gobject-devel Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-inspect-icons Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-java Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-java-devel Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-javadoc Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-man-pages-ja Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-man-pages-uk Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-rescue Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-rsync Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-tools Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-tools-c Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-winsupport Fixed in 8.6-1.module_el8.6.0+2880+7d9e3703
- libguestfs-xfs Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libiscsi Fixed in 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-devel Fixed in 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-utils Fixed in 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libnbd Fixed in 1.6.0-5.module_el8.6.0+2880+7d9e3703
- libnbd-bash-completion Fixed in 1.6.0-5.module_el8.6.0+2880+7d9e3703
- libnbd-devel Fixed in 1.6.0-5.module_el8.6.0+2880+7d9e3703
- libtpms Fixed in 0.9.1-0.20211126git1ff6fe1f43.module_el8.6.0+2880+7d9e3703
- libtpms-devel Fixed in 0.9.1-0.20211126git1ff6fe1f43.module_el8.6.0+2880+7d9e3703
- libvirt Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-client Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-config-network Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-config-nwfilter Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-driver-interface Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-driver-network Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-driver-nodedev Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-driver-nwfilter Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-driver-qemu Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
90 further packages in AlmaLinux 8 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- ntfs-3g Fixed in 2021.8.22-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- SLOF Fixed in 20210217-1.module_el8.6.0+2880+7d9e3703
- hivex Fixed in 1.3.18-23.module_el8.6.0+2880+7d9e3703
- hivex-devel Fixed in 1.3.18-23.module_el8.6.0+2880+7d9e3703
- libguestfs Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-appliance Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-bash-completion Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-devel Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-gfs2 Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-gobject Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-gobject-devel Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-inspect-icons Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-java Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-java-devel Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-javadoc Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-man-pages-ja Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-man-pages-uk Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-rescue Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-rsync Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-tools Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-tools-c Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libguestfs-winsupport Fixed in 8.6-1.module_el8.6.0+2880+7d9e3703
- libguestfs-xfs Fixed in 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma
- libiscsi Fixed in 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-devel Fixed in 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-utils Fixed in 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libnbd Fixed in 1.6.0-5.module_el8.6.0+2880+7d9e3703
- libnbd-bash-completion Fixed in 1.6.0-5.module_el8.6.0+2880+7d9e3703
- libnbd-devel Fixed in 1.6.0-5.module_el8.6.0+2880+7d9e3703
- libtpms Fixed in 0.9.1-0.20211126git1ff6fe1f43.module_el8.6.0+2880+7d9e3703
- libtpms-devel Fixed in 0.9.1-0.20211126git1ff6fe1f43.module_el8.6.0+2880+7d9e3703
- libvirt Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-client Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-config-network Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-config-nwfilter Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-driver-interface Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-driver-network Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-driver-nodedev Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-driver-nwfilter Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
- libvirt-daemon-driver-qemu Fixed in 8.0.0-5.module_el8.6.0+2880+7d9e3703
90 further packages in CloudLinux 8 not shown (first 40 listed).
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- ntfs-3g Fixed in 1:2021.8.22-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- ntfs-3g Fixed in 1:2021.8.22-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- ntfs-3g Fixed in 1:2021.8.22-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- ntfs-3g Fixed in 1:2017.3.23-2ubuntu0.18.04.3
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- ntfs-3g Fixed in 1:2017.3.23AR.3-3ubuntu1.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- ntfs-3g Fixed in 1:2017.3.23AR.3-3ubuntu5
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- ntfs-3g Fixed in 1:2013.1.13AR.1-2ubuntu2+esm1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- ntfs-3g Fixed in 1:2015.3.14AR.1-1ubuntu0.3+esm1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.