Security readout for executives and security teams
Plain-English summary
CVE-2022-48979 is a Linux kernel AMD display driver bug where an internal array could be indexed past its declared size. The public record confirms a kernel fix but does not provide severity, impact, exploitability, or attack requirements.
Executive priority
Treat as a kernel maintenance item until severity is clarified. It should be handled through normal patch governance, with priority increased for fleets using AMD graphics on affected Linux kernels.
Technical view
The issue is in drm/amd/display DCN32 DML. LinkCapacitySupport was declared using a max-DPP-related size but indexed by voltage-state count. The kernel fix changes the declaration to the larger total voltage-state size, preventing out-of-bounds array access.
Likely exposure
Exposure appears limited to Linux systems running affected kernel versions with the AMD display DCN32 code path relevant. The source bundle does not confirm whether servers without AMD display hardware, headless deployments, or all AMD GPU systems are affected.
Exploitation context
No provided source reports active exploitation, public exploit code, or inclusion in CISA KEV. The bundle only states that the vulnerability was resolved in the Linux kernel and provides stable commit references.
Researcher notes
The root cause is a size mismatch between LinkCapacitySupport declaration and the index domain. The public data does not state memory corruption consequences, privilege boundary crossed, reachable trigger conditions, or crash behavior.
Mitigation direction
- Check your Linux distribution kernel advisory for CVE-2022-48979 coverage.
- Update affected kernels to builds containing the referenced stable fixes.
- Prioritize endpoints or hosts using AMD display hardware and affected kernel lines.
- If patching is delayed, follow vendor guidance; no interim mitigation is provided here.
Validation and detection
- Inventory Linux kernel versions against the affected versions in the CVE record.
- Confirm installed kernel changelogs include the referenced stable commit fixes.
- Review assets with AMD GPU or display-driver usage first.
- Track the CVE record and distro advisories for severity or impact updates.
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-2022-48979 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/3d8a298b2e83b98042e6ec726e934f535b23e6aaCVE reference, Linux
- https://git.kernel.org/stable/c/aeffc8fb2174f017a10df114bc312f899904dc68CVE 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.