Security readout for executives and security teams
Plain-English summary
CVE-2022-48826 is a Linux kernel reliability flaw in the VC4 display driver. When a DSI display device attach fails, the error path can deadlock, leaving the DSI display non-operational and potentially blocking shutdown or reboot. The sources do not show remote code execution, privilege escalation, or active exploitation.
Executive priority
Treat as a targeted reliability issue, not a broad emergency. Patch affected display devices through normal kernel maintenance, with higher priority for kiosks, embedded appliances, or operational systems where a stuck display or reboot failure causes downtime.
Technical view
The issue is in drm/vc4 DSI host attach error handling. The attach path runs while the host device lock is held; unregistering the host on an attach error can re-enter device removal and deadlock. The provided traces show hangs during startup deferred probing and shutdown waiting for device probe work.
Likely exposure
Exposure is likely limited to Linux systems using the VC4 DRM driver with MIPI DSI display attachment paths. General servers and systems without this display stack are unlikely to be affected. Exact distro exposure requires mapping installed kernel packages to the referenced stable fixes.
Exploitation context
The bundle marks KEV as false and provides no evidence of in-the-wild exploitation. The described trigger is an attach error or probe retry in the DSI device path, suggesting operational denial of service rather than a remotely exploitable security boundary bypass.
Researcher notes
Evidence is limited to the CVE description and upstream stable commit references. No CVSS, CWE, exploit details, or vendor-specific package status are provided. The impact appears to be deadlock-induced denial of service in a specific kernel display-driver path.
Mitigation direction
- Update to a vendor-supported kernel containing the referenced stable fixes.
- Map distro kernel builds to the upstream stable commit references before closing exposure.
- Prioritize affected embedded or display-dependent systems where reboot reliability matters.
- If no package exists, seek vendor guidance for a supported backport.
Validation and detection
- Inventory systems using the Linux VC4 DRM and MIPI DSI display stack.
- Check running kernel versions and vendor changelogs for the referenced fix commits.
- Review boot logs for DSI attach failures, deferred probe hangs, or vc4 errors.
- Confirm reboot and shutdown complete normally after applying the fixed kernel.
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-2022-48826 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.
SSVC decision data
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/770d1ba9a8201ce9bee0946eb03746449b6f3b80CVE reference, Linux
- https://git.kernel.org/stable/c/dddd832f35096fbc5004e3a7e58fb4d2cefb8debCVE reference, Linux
- https://git.kernel.org/stable/c/0a3d12ab5097b1d045e693412e6b366b7e82031bCVE 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.