Cyber Resilience

CVE-2026-28422

Memory Safety in Vim ≤ 9.2.0078

Memory Safety
Published
27 February 2026
Modified
04 March 2026
Patch / advisory
View advisory
CVSS Score v3.1 2.2
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
EPSS Score 0.0014 4th percentile
Risk Priority 15 floored blend · peak EPSS

Summary

CVE-2026-28422 is a low-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Vim Vim. Its CVSS base score is 2.2 (Low).

Operationally, ranked at the 4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to CM-2 (Baseline Configuration) and SI-2 (Flaw Remediation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

Vim is an open source, command line text editor. Prior to version 9.2.0078, a stack-buffer-overflow occurs in `build_stl_str_hl()` when rendering a statusline with a multi-byte fill character on a very wide terminal. Version 9.2.0078 patches the issue.

CWE(s)
CWE-121

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

Insufficient information to map techniques.
Confidence: LOW · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-26269Same product: Vim Vim
CVE-2023-2610Same product: Vim Vim
CVE-2023-46246Same product: Vim Vim
CVE-2026-55892Same product: Vim Vim
CVE-2023-2426Same product: Vim Vim
CVE-2023-1170Same product: Vim Vim
CVE-2023-0288Same product: Vim Vim
CVE-2026-28418Same product: Vim Vim
CVE-2026-57455Same product: Vim Vim
CVE-2026-57453Same product: Vim Vim

Affected Assets

vim
vim
≤ 9.2.0078

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • SI-2 Flaw Remediation
  • CM-2 Baseline Configuration
Detect
Catch it (NIST detect / respond)
  • RA-5 Vulnerability Monitoring and Scanning
Harden
Shrink the surface (DISA STIG)
  • 2 hardening rules · 2 OS baselines
Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Directly requires timely application of the vendor patch (9.2.0078) that eliminates the stack-buffer-overflow in build_stl_str_hl().

CM-2 Baseline Configuration good match
prevent

Enforces an approved baseline that includes only patched Vim versions, preventing use of vulnerable builds on wide terminals.

RA-5 Vulnerability Monitoring and Scanning partial match
detect

Requires scanning to discover instances of Vim < 9.2.0078 that remain exposed to the CWE-121 flaw.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure-development practices directly prevent introduction of stack buffer overflows.

ID.RA-01 partial match
prevents

Vulnerability scanning can discover stack buffer overflows but does not prevent their introduction.

PR.PS-02 partial match
prevents

Patching eliminates known instances of the weakness after discovery.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
detects

Security testing (fuzzing, static analysis) detects stack overflows before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates buffer-safety practices that directly prevent stack overflows.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify buffer-size and input-validation rules.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles include memory-safety and least-privilege stack usage.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly forbid unsafe buffer handling that causes CWE-121.

A.8.32 Change management none match
none

Change-management gates can enforce security reviews that catch buffer issues.

References