Security readout for executives and security teams
Plain-English summary
CVE-2021-47165 is a Linux kernel crash bug in the Meson DRM display driver. Under a specific startup state, shutdown or reboot can dereference missing driver data and crash the system. The evidence points to availability impact, not data theft or remote compromise.
Executive priority
Treat this as a targeted reliability fix rather than an emergency security incident. Patch affected Linux appliances or embedded systems through normal maintenance, sooner where reboot failures could disrupt operations or field recovery.
Technical view
The Meson DRM shutdown path calls meson_drv_shutdown before the private driver structure exists, such as when dw-hdmi is not loaded or probe is deferred. The fix is a guard that checks whether the priv structure was allocated before use. Affected evidence is limited to listed Linux kernel versions and stable commits.
Likely exposure
Exposure is most likely on Linux systems using the Meson DRM driver, commonly tied to Amlogic Meson ARM64 display hardware. Generic servers without this driver path are less likely to be exposed based on the provided sources.
Exploitation context
The source bundle does not indicate active exploitation, public exploit use, or KEV listing. The described trigger is a shutdown or reboot crash when driver probing has not completed, which limits business impact mainly to system availability and reliability.
Researcher notes
The evidence is sparse: no CVSS, CWE, exploit report, or distribution-specific advisory is included. Analysis should stay close to the kernel description and stable commits. The vulnerable condition depends on driver probe state and Meson DRM component initialization.
Mitigation direction
- Apply a Linux stable kernel update containing the Meson DRM shutdown fix.
- Check vendor kernel advisories for backported fixes to supported distributions.
- Prioritize exposed embedded or appliance systems that depend on clean reboot behavior.
- Avoid assuming mitigation beyond vendor kernel guidance from the provided sources.
Validation and detection
- Inventory systems using the Linux Meson DRM driver or Amlogic Meson display hardware.
- Compare running kernel builds with affected versions and referenced stable commits.
- Review reboot or shutdown logs for meson_drv_shutdown null pointer dereference traces.
- Confirm kernel package changelogs include CVE-2021-47165 or the referenced fix commits.
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-2021-47165 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/b4298d33c1fcce511ffe84d8d3de07e220300f9bCVE reference, Linux
- https://git.kernel.org/stable/c/e256a0eb43e17209e347409a80805b1659398d68CVE reference, Linux
- https://git.kernel.org/stable/c/4ce2bf20b4a6e307e114847d60b2bf40a6a1fac0CVE reference, Linux
- https://git.kernel.org/stable/c/d66083c0d6f5125a4d982aa177dd71ab4cd3d212CVE reference, Linux
- https://git.kernel.org/stable/c/b4b91033a0b11fe9ade58156cd9168f89f4a8c1aCVE reference, Linux
- https://git.kernel.org/stable/c/7cfc4ea78fc103ea51ecbacd9236abb5b1c490d2CVE 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.