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CVE-2026-46091 Linux CVE debrief

A DMA coherency vulnerability in the Linux kernel's igorplugusb remote control driver has been resolved. The USB request structure used in control requests could be subject to DMA on some host controllers without obeying DMA coherency rules, potentially leading to memory corruption or unstable behavior. The fix allocates the USB request structure separately to ensure proper DMA coherency compliance.

Vendor
Linux
Product
Unknown
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-27
Original CVE updated
2026-06-25
Advisory published
2026-05-27
Advisory updated
2026-06-25

Who should care

Linux system administrators, kernel maintainers, and users of systems with IgorPlug USB remote control receivers

Technical summary

The igorplugusb driver in the Linux kernel's media subsystem failed to properly handle DMA coherency requirements for USB request structures during control transfers. On host controllers that perform DMA on these structures, this violation of coherency rules could result in memory corruption, data inconsistency, or system instability. The resolution allocates the USB request structure separately to ensure it complies with DMA coherency requirements.

Defensive priority

medium

Recommended defensive actions

  • Review kernel version and confirm whether the igorplugusb driver is in use
  • Apply kernel updates containing the referenced stable commits when available
  • Monitor distribution security advisories for backported fixes
  • Consider disabling the igorplugusb driver if not required and patches are unavailable

Evidence notes

The vulnerability description indicates this is a resolved Linux kernel issue in the media/rc/igorplugusb driver. The fix involves proper DMA coherency handling for USB request structures during control transfers. Multiple stable kernel commits are referenced, suggesting backports to various kernel versions.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46091 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46091

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-46091 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46091

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/0adac0ee2c42027d80bac02ea9b576a88f8955d3

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/0be8fcd9005e3d3b5a61fe34b070a9663adbb4dc

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/18d6a7c9e4e63c57157e9a57dd9bf3cd38e4c45a

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/a62ca67e3c72fb297dc7c86495ba8f7329d7f150

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/eac69475b01fe1e861dfe3960b57fa95671c132e

    416baaa9-dc9f-4396-8d5f-8c081fb06d67

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.