CVE-2021-33285
In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS attribute is supplied to the function ntfs_get_attribute_value, a heap…
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS attribute is supplied to the function ntfs_get_attribute_value, a heap buffer overflow can occur allowing for memory disclosure or denial of service. The vulnerability is caused by an out-of-bound buffer access which can be triggered by mounting a crafted ntfs partition. The root cause is a missing consistency check after reading an MFT record : the "bytes_in_use" field should be less than the "bytes_allocated" field. When it is not, the parsing of the records proceeds into the wild.
Timeline
ID reserved
By mitre
- 4 months later
· 4 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium6.7 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.41% · top 64% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.7.
Weakness
Affected products
n/a
- affected n/a
References (10)
- [oss-security] 20210830 NTFS3G-SA-2021-0001: Multiple buffer overflows in all versions of NTFS-3G (opens in a new tab)mailing-listx_transferred
- https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-q759-8j5v-q5jp (opens in a new tab)x_transferred
- https://www.openwall.com/lists/oss-security/2021/08/30/1 (opens in a new tab)x_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=2001608 (opens in a new tab)x_transferred
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988386 (opens in a new tab)x_transferred
- DSA-4971 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-e7c8ba6301 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-5b1dac797b (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20211116 [SECURITY] [DLA 2819-1] ntfs-3g security update (opens in a new tab)mailing-listx_transferred
- GLSA-202301-01 (opens in a new tab)vendor-advisoryx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-33285)Record last updated .