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MEDIUM

CVE-2026-28421

CVSS v3

5.3

MEDIUM

EPSS Score

0.2 %

exploit probability, as of 2026-10-15

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

  • vim-dataAlmaLinux:10all versions · fixed in 2:9.1.083-6.el10_1.3and 1 other package
  • vim-X11AlmaLinux:9all versions · fixed in 2:8.2.2637-23.el9_7.2and 4 other packages
  • vim-X11AlmaLinux:8all versions · fixed in 2:8.0.1763-22.el8_10.1and 4 other packages

Vendor advisories

  • CVE-2026-28421 Red Hat Product Security658 products fixed · 1 known affected

    vim: Vim: Denial of service and information disclosure via crafted swap file

    openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4

  • RHSA-2026:69128 Red Hat Product Security10 products fixed

    Red Hat Security Advisory: vim security update

  • RHSA-2026:25096 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: Red Hat AI Inference Server Model Optimization Tools 3.2.2 (cuda)

  • RHSA-2026:17596 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.17.54 bug fix and security update

  • RHSA-2026:14773 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.15.64 bug fix and security update

  • RHSA-2026:15087 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.14.65 bug fix and security update

25 more advisories

Full record on NVD

Description

Vim is an open source, command line text editor. Versions prior to 9.2.0077 have a heap-buffer-overflow and a segmentation fault (SEGV) exist in Vim's swap file recovery logic. Both are caused by unvalidated fields read from crafted pointer blocks within a swap file. Version 9.2.0077 fixes the issue.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Published
2026-02-27
Last Modified
2026-03-04

Frequently asked questions

What is CVE-2026-28421?

Vim is an open source, command line text editor. Versions prior to 9.2.0077 have a heap-buffer-overflow and a segmentation fault (SEGV) exist in Vim's swap file recovery logic. Both are caused by unvalidated fields read from crafted pointer blocks within a swap file. Version 9.2.0077 fixes the issue.

Is CVE-2026-28421 actively exploited?

Active exploitation of CVE-2026-28421 has not been confirmed. Its EPSS score was 0.2% on 2026-10-15, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-28421?

CVE-2026-28421 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.

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