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CVE-2021-33287

HIGH
7.8
CVSS Score
Published: September 7, 2021 at 12:00 AM UTC
Updated: July 9, 2026 at 01:16 AM UTC
3 products affected across 3 vendorsDebian LinuxFedoraNTFS-3G

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

In NTFS-3G versions < 2021.8.22, when specially crafted NTFS attributes are read in the function ntfs_attr_pread_i, a heap buffer overflow can occur and allow for writing to arbitrary memory or denial of service of the application.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.011.09.0
Fedora· Fedora Projectrpm
95%
3335
NTFS-3G· Tuxera
95%
v < 2021.8.22
Affected range stops below 2021.8.22, so it looks safe — our inference, not a vendor statement

References (11)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787CWE-20

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