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CVE-2026-93070 Linux CVE debrief

A vulnerability was found in the Linux kernel's media ipu6 component. The issue arises from a double-free error when the auxiliary device is initialized. Specifically, the `ipu6_bus_initialize_device` function stores the isys/psys pdata pointer in `struct ipu6_bus_device` and initializes the auxiliary device. However, error unwinding must drop the auxiliary device reference and let `ipu6_bus_release` free both the bus device and `adev->pdata`. The isys and psys init paths already call `put_device` when MMU initialization fails, and `ipu6_bus_add_device` calls `auxiliary_device_uninit` on `auxiliary_device_add` failure. Both paths therefore run the bus release callback. Removing the manual pdata frees after the auxiliary device has been initialized fixes the issue.

Vendor
Linux
Product
Unknown
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-17
Original CVE updated
2026-09-18
Advisory published
2026-09-17
Advisory updated
2026-09-18

Who should care

Defenders responsible for Linux kernel-based systems, particularly those utilizing the ipu6 component, should assess exposure and prioritize patching or implementing compensating controls. This includes system administrators, security teams, and developers working with Linux kernel-based systems.

Why it matters

CVE-2026-93070 is a double-free vulnerability in the Linux kernel's media ipu6 component. Defenders should prioritize verifying and applying patches, assessing exposure, and implementing compensating controls. Evidence is based on official CVE and NVD records, as well as Linux kernel source references.

  • Verification of Linux kernel versions and ipu6 component usage is necessary to assess exposure
  • Potential for system crashes or instability if the vulnerability is exploited
  • Need for patching or applying compensating controls to prevent exploitation
  • Monitoring system logs for potential exploitation attempts is recommended

Technical summary

The Linux kernel's media ipu6 component is vulnerable to a double-free error. This occurs when the auxiliary device is initialized, and error unwinding leads to a second free of the same object. The issue is resolved by removing manual pdata frees after auxiliary device initialization. Affected product deployments should be verified, and patches applied or compensating controls implemented to prevent exploitation. This involves reviewing system inventory, assessing exposure, and prioritizing patching or mitigations.

Defensive priority

Defenders should prioritize verifying and applying patches for Linux kernel versions affected by this vulnerability, particularly those utilizing the ipu6 component. This involves reviewing system inventory, assessing exposure, and implementing compensating controls where patches are not immediately feasible.

Recommended defensive actions

  • Verify and apply patches for Linux kernel versions affected by this vulnerability
  • Review system inventory to assess exposure
  • Implement compensating controls where patches are not immediately feasible
  • Monitor system logs for potential exploitation attempts
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The vulnerability was identified through static analysis and confirmed by manual source review. The issue is resolved in the Linux kernel through the removal of manual pdata frees after auxiliary device initialization.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-93070 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-93070

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

  • CVE-2026-93070 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-93070

    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/5323ed5a7bb2568191ec676b2035b0396105aa05

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

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/7d102d1f0631807a491a140f67c9628dea85dfd2

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

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/9be07216af4cfc4813e1a46ce26407d31ea845de

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

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/faa1eb97f0e66bf122f44b62be6b323f86333e9f

    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.