Security readout for executives and security teams
Plain-English summary
This is a Linux kernel availability flaw in the MediaTek video codec driver. A local low-privileged user could trigger a NULL pointer dereference during a decode error, causing a system crash. The sources do not indicate data theft or privilege escalation.
Executive priority
Treat as a moderate availability issue. It is most urgent for systems where local users or workloads can access affected MediaTek media decode functionality. Patch through normal kernel maintenance unless exposed operational devices have high uptime requirements.
Technical view
CVE-2022-50383 is a CWE-476 NULL pointer dereference in Linux media: mediatek vcodec LAT decode error handling. Incorrect destination buffer completion can let the core thread access a freed or null buffer, crashing the kernel. CVSS is 5.5 with local, low-privilege access and high availability impact.
Likely exposure
Exposure appears limited to Linux systems running affected kernel versions with the MediaTek vcodec driver path present or used. The bundle lists Linux kernel versions 5.19, 6.0.16, 6.1.2, and 6.2 as affected, but downstream distro backport status is not provided.
Exploitation context
The CVE is not listed as KEV in the bundle, and no cited source reports active exploitation. The CVSS vector requires local access and low privileges, with no user interaction. The practical risk is denial of service rather than compromise of confidentiality or integrity.
Researcher notes
Evidence is limited to the CVE record, CVSS metadata, and Linux stable commit references. Do not assume remote exploitability, privilege escalation, or universal Linux exposure. Focus validation on kernel version, downstream patch status, and whether the mediatek vcodec LAT decode path is reachable.
Mitigation direction
- Apply kernel or distribution updates containing the referenced stable fixes.
- Check vendor advisories for backported fixes matching your deployed kernels.
- Prioritize shared, embedded, or appliance systems where local users can reach media decode paths.
- Restrict unnecessary local access on systems awaiting validated kernel updates.
Validation and detection
- Inventory Linux kernel versions across affected fleets.
- Confirm whether MediaTek vcodec support is present on candidate systems.
- Verify patched kernels include a referenced stable commit or vendor backport.
- Review crash logs for NULL pointer dereferences in mediatek vcodec paths.
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
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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
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Open ATT&CK lookupCVE-2022-50383 mapping review
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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.
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:H1.83.6Primary CVE scoreVulnerability 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
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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.