LiveActive security incident?Get immediate response
CVE Record

CVE-2022-49868: phy: ralink: mt7621-pci: add sentinel to quirks table

In the Linux kernel, the following vulnerability has been resolved: phy: ralink: mt7621-pci: add sentinel to quirks table With mt7621 soc_dev_attr fixed to register the soc as a device, kernel will experience an oops in soc_device_match_attr This quirk test was introduced in the staging driver in commit 9445ccb3714c ("staging: mt7621-pci-phy: add quirks for 'E2' revision using 'soc_device_attribute'"). The staging driver was removed, and later re-added in commit d87da32372a0 ("phy: ralink: Add PHY driver for MT7621 PCIe PHY") for kernel 5.11

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel reliability issue affecting systems using the Ralink/MediaTek MT7621 PCIe PHY driver. A missing end marker in a quirks table can cause a kernel oops after related SoC device registration behavior changed. The public data does not show business-impact details beyond crash risk.

Executive priority

Handle through normal kernel maintenance unless MT7621-based devices are operationally critical. There is no provided evidence of exploitation or remote compromise, but kernel oops conditions can affect availability on embedded infrastructure.

Technical view

The fix adds a sentinel to the MT7621 PCIe PHY quirks table. Without it, soc_device_match_attr can read past the intended table and trigger an oops. The issue traces to the driver reintroduced for Linux 5.11 and is addressed by referenced Linux stable commits.

Likely exposure

Exposure appears limited to Linux systems with affected kernel versions and MT7621 PCIe PHY driver/hardware paths. The source bundle lists Linux 5.11, 5.15.79, 6.0.9, and 6.1 as affected markers but does not provide distro package mapping.

Exploitation context

No active exploitation is supported by the provided sources. KEV is false, and the bundle contains no public exploit report, attacker model, or remote trigger details. Treat this as a kernel stability flaw unless vendor guidance says otherwise.

Researcher notes

The source data is sparse: no CVSS, CWE, exploitability analysis, or distro advisories are provided. The clearest technical signal is the missing sentinel in the quirks table causing soc_device_match_attr oops behavior after SoC device registration changes.

Mitigation direction

  • Update to a kernel containing the referenced Linux stable fixes.
  • Check distro or device-vendor advisories for patched kernel or firmware builds.
  • Prioritize MT7621-based routers, gateways, and embedded Linux appliances.
  • If patching is delayed, monitor for kernel oops events involving soc_device_match_attr.

Validation and detection

  • Inventory systems using Linux kernels in the affected range.
  • Identify MT7621 or Ralink PCIe PHY hardware and driver usage.
  • Confirm the running kernel includes one of the referenced stable commits.
  • Review kernel logs for oops traces around soc_device_match_attr.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CVE-2022-49868 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
3Timeline events
0ADP providers
4Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxd87da32372a03ce121fc65ccd2c9a43edf56b364, d87da32372a03ce121fc65ccd2c9a43edf56b364, d87da32372a03ce121fc65ccd2c9a43edf56b364unaffected
LinuxLinux5.11, 0, 5.15.79, 6.0.9, 6.1affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.