Security readout for executives and security teams
Plain-English summary
CVE-2022-49484 is a Linux kernel driver crash issue. On systems using the mt76 mt7915 wireless driver, a specific hardware state can trigger a NULL pointer dereference and cause high availability impact. The sources do not show data theft, privilege escalation, or active exploitation.
Executive priority
Treat as a moderate availability risk. Prioritize patching where Linux endpoints or appliances use affected MediaTek wireless drivers, especially operational systems where local denial of service would disrupt service.
Technical view
The flaw is CWE-476 in mt7915_mac_fill_rx_vector. If a chip lacks dbdc support and hardware reports band_idx as 1, the driver may dereference NULL. CVSS 3.1 is 5.5: local attack vector, low complexity, low privileges, no user interaction, availability high.
Likely exposure
Exposure is most relevant to Linux systems running affected kernel versions with the mt76 mt7915 wireless driver and matching MediaTek wireless hardware. Systems without this driver or hardware are less likely to be exposed based on the provided description.
Exploitation context
The CVE is not listed as KEV in the bundle. The provided sources do not report public exploitation. CVSS indicates local access with low privileges is required, and the expected impact is denial of service rather than confidentiality or integrity compromise.
Researcher notes
Evidence is limited to CVE metadata and Linux stable commit references. The bundle names a resolved NULL pointer dereference but does not provide exploit details, downstream distro status, or broader affected product mapping.
Mitigation direction
- Update to a vendor kernel containing the referenced Linux stable fixes.
- Check Linux distribution advisories for CVE-2022-49484 package status.
- Prioritize systems using mt76 mt7915 wireless hardware or drivers.
- Limit local untrusted user access until vendor fixes are applied.
Validation and detection
- Inventory Linux kernels against the affected version metadata in the CVE record.
- Confirm whether systems load or depend on the mt76 mt7915 driver.
- Verify the running kernel includes the referenced stable commits or vendor backport.
- Review crash logs for related mt7915 or mt76 NULL dereference events.
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.
CWE-476: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-49484 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
- 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.
SSVC decision data
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:H1.83.6CISA-ADPVulnerability 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
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/268e8ef187eb8780d021b0e4f5ffa92dee5c4983CVE reference, Linux
- https://git.kernel.org/stable/c/62fdc974894eec80d678523458cf99bbdb887e22CVE 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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.