Security readout for executives and security teams
Plain-English summary
CVE-2023-52455 is a Linux kernel IOMMU bug triggered by firmware or bootloader data that describes a framebuffer IOVA reservation with address and size set to zero. That malformed reservation can corrupt internal IOVA tracking and break display IOMMU mappings. The sources do not show active exploitation or business-impact scoring.
Executive priority
Track through normal kernel patch management unless affected display or embedded platforms are failing at boot or display initialization. Escalate for appliances, kiosks, or infrastructure where display availability is operationally important.
Technical view
The kernel reserved a zero-length IOVA region from the iommu-addresses property. With length zero, the IOVA rbtree could receive an invalid entry where pfn_hi is below pfn_lo, making the valid IOVA space appear reserved and causing display driver mapping failures.
Likely exposure
Exposure appears limited to Linux systems using affected kernel builds with firmware or bootloader data that leaves framebuffer address and size as zero in iommu-addresses, especially display paths relying on kernel display drivers and IOMMU mappings.
Exploitation context
The source bundle marks CISA KEV as false and gives no cited evidence of exploitation in the wild. The issue reads as a reliability and hardware-initialization failure condition rather than a documented remote attack path.
Researcher notes
The vulnerability is source-grounded but sparse: no CVSS, CWE, exploit narrative, or detailed affected range is provided. Focus validation on kernel commit presence, firmware-provided iommu-addresses data, and whether zero-length framebuffer reservations are reachable on the platform.
Mitigation direction
- Update to a vendor kernel containing the referenced stable fixes.
- Check distribution advisories for backported Linux kernel patches.
- Review firmware guidance for zero-length framebuffer IOMMU reservations.
- Avoid assuming a workaround unless your vendor documents one.
Validation and detection
- Inventory Linux kernel versions on systems using IOMMU-backed display paths.
- Confirm vendor kernel changelogs include one of the referenced stable commits.
- Review boot logs for IOMMU or display mapping failures.
- Check relevant device tree or firmware data for zero-size iommu-addresses entries.
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
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CVE-2023-52455 mapping review
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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
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.