Security readout for executives and security teams
Plain-English summary
FreeImage before 1.18.0 can hit a null pointer dereference while reading TIFF palette data. In business terms, software that uses FreeImage to process untrusted TIFF files may crash or fail that processing path. The provided sources do not show data theft, code execution, or active exploitation.
Executive priority
Treat this as a targeted availability risk for systems that process TIFF images with FreeImage. Prioritize patching internet-facing or high-volume ingestion paths first. Broader urgency is limited by missing severity data and no cited active exploitation.
Technical view
CVE-2021-40266 affects the ReadPalette function in FreeImage's PluginTIFF.cpp before version 1.18.0. The published description identifies a null pointer dereference. Available source data does not include CVSS, CWE, exploit details, or a complete affected-product matrix beyond FreeImage before 1.18.0.
Likely exposure
Exposure is most likely where FreeImage is embedded in applications, services, or batch jobs that parse TIFF images, especially from uploads, email, user content, or automated ingestion pipelines.
Exploitation context
The bundle marks CISA KEV as false and provides no cited evidence of active exploitation. The likely impact is denial of service or processing interruption from malformed TIFF input, but the sources do not prove broader compromise.
Researcher notes
Evidence is sparse: the CVE text names ReadPalette in PluginTIFF.cpp and a null pointer dereference, but no CVSS, CWE, proof-of-concept status, or exploitability analysis is provided. Avoid assuming code execution. Focus validation on dependency presence, TIFF attack surface, and vendor patch status.
Mitigation direction
- Inventory FreeImage usage across applications, containers, packages, and build dependencies.
- Upgrade FreeImage to 1.18.0 or a vendor-patched package where available.
- Apply relevant Fedora package updates on affected Fedora systems.
- Restrict untrusted TIFF ingestion until vulnerable components are updated.
- Check vendor guidance for downstream products that bundle FreeImage.
Validation and detection
- Confirm deployed FreeImage versions are 1.18.0 or vendor-patched builds.
- Identify services that accept or transform TIFF files from untrusted sources.
- Review SBOMs and package manifests for bundled FreeImage copies.
- Verify Fedora hosts have installed the referenced security updates.
- Confirm monitoring covers crashes in image-processing workers or upload services.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-40266 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://sourceforge.net/p/freeimage/bugs/334/CVE reference
- FEDORA-2023-604a7d56b0CVE reference · vendor-advisory
- FEDORA-2023-8e640cb540CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.