Security readout for executives and security teams
Plain-English summary
CVE-2022-50256 is a Linux kernel memory-safety bug in the Meson DRM display driver. It can leave stale references after driver unload, causing freed memory to be touched when the modules are loaded again. Business impact is most relevant to Linux systems using affected Amlogic Meson graphics hardware or kernels containing this driver path.
Executive priority
Treat this as a targeted kernel maintenance item, not an internet-wide emergency. Prioritize embedded, appliance, or ARM Linux fleets using Meson graphics hardware, especially where uptime or kernel stability matters.
Technical view
The issue is a use-after-free in the Linux DRM bridge list. Meson HDMI/CVBS bridge objects were added but not manually removed during aggregate driver unbind, leaving dangling entries in global bridge_list. Reloading the driver could traverse freed memory, with KASAN reporting the fault during drm_bridge_add.
Likely exposure
Exposure appears limited to Linux systems with the Meson DRM driver stack, such as Amlogic Meson-based devices. The source bundle lists Linux kernel versions as affected and references stable kernel fixes, but does not provide distribution-specific package status.
Exploitation context
The bundle does not cite active exploitation, and KEV is false. The demonstrated failure path involves module unload and reload, observed by KASAN during modprobe. No remote attack vector, privilege boundary impact, or weaponized exploit is established in the supplied evidence.
Researcher notes
Evidence supports a dangling-reference use-after-free in the Meson DRM bridge lifecycle. The source bundle lacks CVSS, CWE, exploitability analysis, and distro package mapping, so impact should be validated against exact kernel trees and hardware use.
Mitigation direction
- Review vendor or distribution kernel advisories for CVE-2022-50256.
- Update affected Linux kernels to builds containing the referenced stable fixes.
- Prioritize Meson/Amlogic display devices that allow driver reloads or module management.
- Avoid unnecessary unloading and reloading of Meson DRM modules until patched.
Validation and detection
- Inventory systems using Amlogic Meson SoCs or the meson_drm driver.
- Check deployed kernel versions against vendor fix advisories and stable commit backports.
- Review kernel logs for KASAN or use-after-free reports around meson_drm reloads.
- Confirm patched kernels include the referenced DRM Meson bridge removal changes.
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-2022-50256 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.
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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/de2b6ebe0cb7746b5b6b35d79e150d934392b958CVE reference, Linux
- https://git.kernel.org/stable/c/fc1fd114dde3d2623ac37676df3d74ffeedb0da8CVE reference, Linux
- https://git.kernel.org/stable/c/09847723c12fc2753749cec3939a02ee92dac468CVE 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.