Security readout for executives and security teams
Plain-English summary
CVE-2023-39327 is an OpenJPEG resource-consumption issue. A maliciously crafted picture can make affected software spend excessive time in a loop and repeatedly print warnings, causing limited availability impact rather than data theft or system takeover.
Executive priority
Handle through normal vulnerability management unless affected systems process untrusted images at scale. Prioritize internet-facing upload pipelines, shared conversion services, and operational workloads where looping could disrupt service availability.
Technical view
The flaw is categorized as CWE-400 and affects OpenJPEG 2.5.0 plus listed Red Hat openjpeg2 packages and containers. CVSS 3.1 is 4.3: network-reachable input is possible, no privileges are required, user interaction is required, and impact is limited to availability.
Likely exposure
Exposure is most likely where systems or desktop applications process untrusted JPEG 2000/OpenJPEG images, including listed RHEL 8/9 openjpeg2 packages, RHEL 8 Flatpak apps, and the named Red Hat AI Inference Server container image.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation appears to require getting a user or workflow to process a crafted image. The documented effect is excessive looping and warning output, not code execution.
Researcher notes
Evidence supports a denial-of-service style resource issue only. The bundle names affected products and CVSS characteristics but does not provide exploit details, fixed upstream versions, or complete status for RHEL 6/7. Avoid assuming broader product impact.
Mitigation direction
- Review and apply RHSA-2026:4128 where it matches deployed Red Hat products.
- Check vendor guidance for affected OpenJPEG or openjpeg2 package versions.
- Limit processing of untrusted images in exposed or automated workflows.
- Run image-processing workloads with resource limits and isolation where practical.
- Treat RHEL 6 and 7 package status as unknown until vendor-confirmed.
Validation and detection
- Inventory OpenJPEG and openjpeg2 packages across servers, desktops, Flatpaks, and containers.
- Compare deployed products against the affected Red Hat entries in the source bundle.
- Identify workflows that accept or transform untrusted image files.
- Confirm whether RHSA-2026:4128 or later vendor updates are installed.
- Review operational logs for repeated OpenJPEG warnings or image-processing stalls.
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-2023-39327 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
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2026:4128CVE reference · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2023-39327CVE reference · vdb-entry, x_refsource_REDHAT
- RHBZ#2295812CVE reference · issue-tracking, x_refsource_REDHAT
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.