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Vulnerabilities

Vulnerability · CVE-2026-28421

Vim is an open source, command line text editor.

Published Feb 27, 2026 · catalog updated Jun 17, 2026 · Red Hat

Check if you run it

No confirmed exploitation is on record for CVE-2026-28421. EPSS is 0.20%. Act only if a listed version of Red Hat is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.20%
Remediation
Advisory link
Affected products
cpe vim/vim

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe vim/vimversion unspecified

How to fix CVE-2026-28421

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-28421. EPSS is 0.20%. Act only if a listed version of Red Hat is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-122: Heap-based Buffer Overflow; CWE-20: Improper Input Validation. EPSS 0.20%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 27, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Sources

  • CSAF AdvisoriesVendor advisoryRHSA-2026:9832:CVE-2026-28421

    A flaw was found in Vim. This vulnerability, a heap-buffer-overflow and a segmentation fault, exists in the swap file recovery logic. A local attacker could exploit this by providing a specially crafted swap file. This could lead to a denial of service (DoS) or potentially inform

    security.access.redhat.com
  • CVE.orgVulnerability recordCVE-2026-28421

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-28421

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.