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CVE-2021-33289

28
FAUCET Score

CVE-2021-33289 is a heap buffer overflow vulnerability in NTFS-3G versions prior to 2021.8.22, affecting various Debian and Fedora distributions. This high-severity flaw (CVSS 7.8) allows for local code execution with high impact on confidentiality, integrity, and availability if a specially crafted NTFS image is processed. Despite its severity, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2021.8.22CPE matchmatch criteria
cpe:2.3:a:tuxera:ntfs-3g:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.49%
Probability of exploitation in next 30 days
EPSS Percentile
39.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0049 is in the 79th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

microsoftpatch availablevia msrc
Product: cbl2 ntfs-3g 2021.8.22-1 on CBL Mariner 2.0Fixed in: 2021.8.22-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 2021.8.22-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 2021.8.22-1
microsoftpatch availablevia msrc
Product: 19484-16823Fixed in: 2021.8.22-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: virt-devel:rhel-8060020220408104655.d63f516d
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: virt:rhel-8060020220408104655.d63f516d
View patch
redhatpatch availablevia redhat_api
Product: Advanced Virtualization for RHEL 8.2.1Fixed in: virt:8.2-8020120210917153657.863bb0db
View patch
redhatpatch availablevia redhat_api
Product: Advanced Virtualization for RHEL 8.2.1Fixed in: virt-devel:8.2-8020120210917153657.863bb0db
View patch
redhatpatch availablevia redhat_api
Product: Advanced Virtualization for RHEL 8.4.0.ZFixed in: virt:av-8040020210922084349.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Advanced Virtualization for RHEL 8.4.0.ZFixed in: virt-devel:av-8040020210922084349.522a0ee4
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: libguestfs-winsupport
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 8 Advanced VirtualizationFixed in: virt:av/libguestfs-winsupport
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 8 Advanced VirtualizationFixed in: virt:8.2/libguestfs-winsupport

Vendor Advisories (3)

microsoft2021-Dec/CVE-2021-33289

CVE-2021-33289

Dec 14, 2021
microsoft2021-Sep/CVE-2021-33289Important

In NTFS-3G versions < 2021.8.22 when a specially crafted MFT section is supplied in an NTFS image a heap buffer overflow can occur and allow for code execution.

Sep 14, 2021
redhatCVE-2021-33289Moderate

ntfs-3g: Heap buffer overflow triggered by a specially crafted MFT section

Aug 30, 2021

References

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI
github.com / tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp
Third Party Advisory
lists.debian.org / debian-lts-announce/2021/11/msg00013.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/766ISTT3KCARKFUIQT7N6WV6T63XOKG3
lists.fedoraproject.org / archives/list/[email protected]/message/HSEKTKHO5HFZHWZNJNBJZA56472KRUZI
security.gentoo.org / glsa/202301-01
Third Party Advisory
debian.org / security/2021/dsa-4971
Third Party Advisory
openwall.com / lists/oss-security/2021/08/30/1
Mailing ListThird Party Advisory