Security readout for executives and security teams
Plain-English summary
This is a Linux kernel availability issue in the MediaTek DisplayPort driver. A local, low-privileged actor could trigger a crash path when DisplayPort hot-plug interrupts fire before the driver is fully attached. The likely business impact is device or workload disruption, not data theft or privilege escalation based on the supplied sources.
Executive priority
Treat this as a moderate availability risk for affected MediaTek Linux fleets. Prioritize patching where device uptime matters, especially kiosks, appliances, embedded systems, or workstations relying on DisplayPort. It is not currently supported as an internet-scale or data-exposure issue by the supplied evidence.
Technical view
The MediaTek DisplayPort bridge driver enables interrupts during probe. If an HPD interrupt occurs before the bridge is attached to a DRM device, drm_helper_hpd_irq_event() can receive a NULL drm_device and cause a kernel NULL pointer dereference. CVSS is 5.5 with local access, low complexity, low privileges, and high availability impact.
Likely exposure
Exposure is most likely on Linux systems using MediaTek DisplayPort hardware and affected kernel builds carrying this driver behavior. The source metadata identifies Linux kernel versions and stable commits, but does not provide distribution-specific package names or device inventories.
Exploitation context
The bundle does not report active exploitation, and KEV is false. The CVSS vector requires local access and low privileges, with no user interaction. Practical risk is denial of service on affected devices rather than confidentiality or integrity compromise.
Researcher notes
Evidence supports CWE-476 in the Linux kernel MediaTek DP driver. The bug is a race or ordering issue around HPD interrupt handling before DRM attachment. Avoid assuming exploitability beyond local denial of service; the bundle does not name public exploit code, exploitation in the wild, or distribution-specific fixed packages.
Mitigation direction
- Update affected Linux kernels to versions containing the referenced stable fixes.
- Check distribution or device-vendor advisories for packaged kernel update guidance.
- Prioritize MediaTek-based endpoints or embedded systems using DisplayPort output.
- Apply operational monitoring for kernel crashes until updates are deployed.
Validation and detection
- Inventory Linux systems with MediaTek DisplayPort hardware or the relevant DRM bridge driver.
- Compare running kernel builds against vendor-fixed releases and referenced stable commits.
- Review kernel logs for NULL pointer dereferences involving DRM HPD handling.
- Confirm patched systems no longer carry the vulnerable driver path.
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-476: 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-2023-53389 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
SSVC decision data
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:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/6524d3d58797975cc40b85be1e9b89721b4e8d0bCVE reference, Linux
- https://git.kernel.org/stable/c/3551789d0635dfb2df8ab8e7fdbf0647e9c1724cCVE reference, Linux
- https://git.kernel.org/stable/c/d1c04e338016ae2517c641806a831b1f3eee2bedCVE reference, Linux
- https://git.kernel.org/stable/c/36b617f7e4ae663fcadd202ea061ca695ca75539CVE reference, Linux
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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.