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Medium, CVSS 6.5

kamadak-exif vulnerable to Infinite loop when parsing PNG files

CVE-2021-21235GHSA-px9g-8hgv-jvg2

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (kamadak-exif 0.5.3), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • crates.io kamadak-exif

    Affected
    >= 0.5.2, <= 0.5.2
    Fixed in
    0.5.3

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
6.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS
  • CVE-2021-21235: 1.53% estimated exploitation activity in the next 30 days; percentile 74.85 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact Reader::readfromcontainer can cause an infinite loop when a crafted PNG file is given. Patches Version 0.5.3 includes the fix. Workarounds No workaround is available. Applications that do not pass files with the PNG signature to Reader::readfromcontainer are not affected. References <https://github.com/kamadak/exif-rs/security/advisories/GHSA-px9g-8hgv-jvg2 <https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21235 For more information If you have any questions or comments about this advisory: Open an issue in github.com/kamadak/exif-rs

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-px9g-8hgv-jvg2

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2021-21235

Advisory: kamadak-exif vulnerable to Infinite loop when parsing PNG files
IDs: CVE-2021-21235, GHSA-px9g-8hgv-jvg2
Record: https://patchnext.com/advisories/cve-2021-21235 (revision 1, source checked 26 Oct 2026, 15:33 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: kamadak-exif 0.5.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- crates.io kamadak-exif: affected >= 0.5.2, <= 0.5.2; fixed in 0.5.3

## Suggested inspection (read-only)
- crates.io kamadak-exif: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on kamadak-exif.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-px9g-8hgv-jvg2 (GitHub-reviewed advisory GHSA-px9g-8hgv-jvg2 lists affected ranges: crates.io kamadak-exif >=0.5.2 <=0.5.2)

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