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HIGH

CVE-2021-46790

CVSS v3

7.8

HIGH

EPSS Score

0.5 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • hivex-develAlmaLinux:8all versions · fixed in 1.3.18-23.module_el8.6.0+2880+7d9e3703
  • libguestfsAlmaLinux:8all versions · fixed in 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.almaand 24 other packages
  • libguestfs-winsupportAlmaLinux:9all versions · fixed in 9.2-1.el9
  • libguestfs-winsupportAlmaLinux:8all versions · fixed in 8.8-1.module_el8.8.0+3485+7cffc4a3
  • libiscsiAlmaLinux:8all versions · fixed in 1.18.0-8.module_el8.6.0+3161+a07c0ea5and 2 other packages
  • libtpmsAlmaLinux:8all versions · fixed in 0.9.1-2.20211126git1ff6fe1f43.module_el8.8.0+3553+bd08596band 1 other package
  • libvirtAlmaLinux:8all versions · fixed in 8.0.0-19.module_el8.8.0+3553+bd08596band 27 other packages
  • libvirt-dbusAlmaLinux:8all versions · fixed in 1.3.0-2.module_el8.6.0+3161+a07c0ea5

15 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-46790 Red Hat Product Security928 products fixed · 10 known affected

    ntfs-3g: heap-based buffer overflow in ntfsck

    libguestfs-winsupport as a component of Red Hat Enterprise Linux 7 · libguestfs-winsupport.src as a component of Red Hat Enterprise Linux 7 · libguestfs-winsupport.src (virt-devel:8.2) as a component of Red Hat Enterprise Linux 8 Advanced Virtualization

  • RHSA-2023:2757 Red Hat Product Security924 products fixed

    Red Hat Security Advisory: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update

  • RHSA-2023:2179 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: libguestfs-winsupport security update

Full record on NVD

Description

ntfsck in NTFS-3G through 2021.8.22 has a heap-based buffer overflow involving buffer+512*3-2. NOTE: the upstream position is that ntfsck is deprecated; however, it is shipped by some Linux distributions.

Technical details

Published
2022-05-02

Frequently asked questions

What is CVE-2021-46790?

ntfsck in NTFS-3G through 2021.8.22 has a heap-based buffer overflow involving buffer+512*3-2. NOTE: the upstream position is that ntfsck is deprecated; however, it is shipped by some Linux distributions.

Is CVE-2021-46790 actively exploited?

Active exploitation of CVE-2021-46790 has not been confirmed. Its EPSS score was 0.5% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-46790?

CVE-2021-46790 has a CVSS v3 base score of 7.8 (HIGH severity).

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