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FltkApplication · Fltk Project

CVE-2021-28307

HIGH · 7.5 CVSS v3.1 Published 2021-03-12
Fix available
A fix is available. Upgrade to 0.15.3 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An issue was discovered in the fltk crate before 0.15.3 for Rust. There is a NULL pointer dereference during attempted use of a non-raster image for a window icon.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The fltk Rust crate before version 0.15.3 contains a NULL pointer dereference vulnerability that occurs when attempting to use a non-raster image (such as SVG or other vector formats) as a window icon, causing the application to crash.

MitigationUpgrade the fltk crate to version 0.15.3 or later to resolve the NULL pointer dereference when using non-raster images as window icons.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
FltkApplication
Affected:< 0.15.3

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify fltk crate version in use
    Inspect your Cargo.lock file and search for the fltk crate entry, or run 'cargo tree -p fltk' to see the installed version
    Affected if The fltk crate version is less than 0.15.3
  2. Check for icon image loading in code
    Search your source code for calls to methods that set window icons, such as set_icon, set_icons, or similar functions that load images for window display
    Affected if The code loads images as window icons using the fltk crate
  3. Identify image file types used as icons
    Examine the image files referenced in icon-related function calls in your source code, or inspect the asset files loaded as icons at runtime
    Affected if SVG, PDF, PostScript, or any non-raster (non-bitmap) image formats are used as window icons
  4. Verify application behavior with non-raster icons
    Run the application with an SVG or vector image set as the window icon and observe if it crashes or panics
    Affected if The application crashes with a NULL pointer dereference when using non-raster images as icons

You are affected if you are using the fltk crate version below 0.15.3 and your application attempts to use non-raster image formats (such as SVG or other vector formats) as window icons, which will trigger a NULL pointer dereference crash.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to 0.15.3 or later
Fixed in 0.15.3
Interim mitigation

Upgrade the fltk crate to version 0.15.3 or later to resolve the NULL pointer dereference when using non-raster images as window icons.

Fix this in Fltk Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
5.0 hours of engineering $860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-28307 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data