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CVE Record

CVE-2026-46091: media: rc: igorplugusb: heed coherency rules

In the Linux kernel, the following vulnerability has been resolved: media: rc: igorplugusb: heed coherency rules In a control request, the USB request structure can be subject to DMA on some HCs. Hence it must obey the rules for DMA coherency. Allocate it separately.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel driver flaw in the igorplugusb remote-control USB driver. The published description says a USB control-request structure may be touched by DMA on some host controllers and was not allocated according to DMA coherency rules. Business risk is unclear because no CVSS, impact detail, or exploitation evidence is provided.

Executive priority

Treat as a tracked kernel maintenance item, not an emergency, unless your environment uses the affected driver or a vendor raises severity. The current public record lacks impact scoring and exploitation evidence, so urgency should be driven by exposure confirmation and normal kernel patch cadence.

Technical view

The issue is in media/rc/igorplugusb. During a USB control request, the request structure can be subject to DMA on some host controllers, so it must follow DMA coherency requirements. The referenced stable commits resolve this by allocating the structure separately. The CVE record does not state confidentiality, integrity, availability impact, or attack preconditions.

Likely exposure

Exposure appears limited to affected Linux kernel versions that include the igorplugusb driver path. Practical exposure depends on whether the vulnerable kernel build ships this driver, whether it is available or loaded, and whether relevant USB hardware or host-controller behavior is present. The source bundle does not provide a complete affected-version range explanation.

Exploitation context

No active exploitation is stated. KEV is false, and the provided sources do not describe public exploitation, proof-of-concept activity, or weaponized use. The available evidence only confirms a kernel fix for DMA coherency handling in this driver.

Researcher notes

The useful technical lead is the DMA coherency rule violation in the USB control-request allocation path. The record is sparse: no CVSS vector, CWE, exploitability notes, or precise distribution-specific affected ranges are provided. Avoid assuming impact beyond the upstream fix description.

Mitigation direction

  • Track vendor kernel advisories for CVE-2026-46091 and apply fixed kernel updates.
  • Prioritize systems that expose or use the igorplugusb driver path.
  • Confirm whether your distribution has backported one of the referenced stable fixes.
  • If no vendor fix is available, follow vendor guidance for disabling unused affected drivers.

Validation and detection

  • Inventory Linux kernel versions across managed servers, workstations, and appliances.
  • Check whether igorplugusb is built, packaged, enabled, or loaded on those systems.
  • Map deployed kernels against vendor advisories and the referenced upstream stable commits.
  • Record exceptions where affected kernels remain pending vendor remediation.
Prepared
Confidence
medium
Sources
7

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

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CVE-2026-46091 mapping review

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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
6Source 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
LinuxLinuxb1c97193c6437a6083da67f8e97c8ee29b2f1989, b1c97193c6437a6083da67f8e97c8ee29b2f1989, b1c97193c6437a6083da67f8e97c8ee29b2f1989, b1c97193c6437a6083da67f8e97c8ee29b2f1989, b1c97193c6437a6083da67f8e97c8ee29b2f1989unaffected
LinuxLinux3.19, 0, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1affected
Weakness

CWE details

No CWE listed

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