Security readout for executives and security teams
Plain-English summary
OpenEXR before 3.0.1 has a memory handling flaw in its DwaCompressor component. A malicious or malformed EXR image could crash software that uses the vulnerable library. The public sources describe denial of service impact, not data theft or confirmed code execution.
Executive priority
Treat as a targeted availability risk for media, rendering, imaging, and content-processing environments. Prioritize systems that automatically process files from customers, partners, or public uploads. Lower urgency is reasonable for systems with no EXR processing path.
Technical view
The CVE describes an integer overflow that leads to a heap-buffer overflow in OpenEXR DwaCompressor before 3.0.1. The stated impact is application crash for software compiled with OpenEXR. Fedora and Debian advisories published security updates for their packages.
Likely exposure
Exposure is most likely where servers, desktop tools, pipelines, or render services process untrusted EXR image files using vulnerable OpenEXR builds. Asset impact depends on which applications link to OpenEXR and whether they accept external image content.
Exploitation context
The bundle does not identify active exploitation, and KEV is false. The credible exploitation scenario is crafted image processing causing a crash in an application using OpenEXR. Public evidence provided does not support broader claims such as remote code execution.
Researcher notes
Key gaps are missing CVSS data and an incomplete affected-product matrix in the provided bundle. Validate exact package status through vendor advisories and local software composition data. Do not assume exploitation or impact beyond application crash without additional evidence.
Mitigation direction
- Upgrade OpenEXR to 3.0.1 or a vendor-fixed package.
- Apply Fedora or Debian security updates where applicable.
- Rebuild or restart applications statically linked with vulnerable OpenEXR.
- Restrict untrusted EXR file processing until fixed.
- Check vendor guidance for platform-specific package versions.
Validation and detection
- Inventory installed OpenEXR package versions across systems.
- Identify applications and services linked against OpenEXR.
- Confirm EXR-processing workflows are patched before accepting untrusted files.
- Verify distro advisories are applied on Fedora and Debian hosts.
- Document any static builds requiring separate remediation.
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.
CWE-400: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-23215 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
- FEDORA-2021-6af32bfcd2CVE reference · vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1947586CVE reference
- [debian-lts-announce] 20210703 [SECURITY] [DLA 2701-1] openexr security updateCVE reference · mailing-list
- DSA-5299CVE reference · vendor-advisory
- [debian-lts-announce] 20221211 [SECURITY] [DLA 3236-1] openexr security updateCVE reference · mailing-list
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.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.