PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-46292 Linux CVE debrief

A vulnerability was discovered in the Linux kernel's pmdomain core. The issue arises from a missing call to pm_runtime_disable() in genpd_dev_pm_detach(), which can cause runtime PM to remain enabled for virtual devices after they are detached from their genpd. This can lead to critical errors, such as a NULL pointer dereference bug in genpd_runtime_suspend(), or unnecessary performance state votes for devices.

Vendor
Linux
Product
Unknown
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Linux kernel developers and users who rely on the pmdomain core functionality should be aware of this vulnerability.

Technical summary

The vulnerability is caused by a missing call to pm_runtime_disable() in genpd_dev_pm_detach(). This can lead to issues such as critical errors and unnecessary performance state votes.

Defensive priority

high

Recommended defensive actions

  • Apply the patches provided in the kernel.org references to fix the vulnerability.
  • Ensure that the Linux kernel is updated to a version that includes the fix.

Evidence notes

The vulnerability was resolved by adding a call to pm_runtime_disable() in genpd_dev_pm_detach().

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46292 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46292

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

  • CVE-2026-46292 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46292

    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/26735dfdd8930d9ef1fa92e590a9bf77726efdf6

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

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/361518a26e4434e879db6ff43bf364795dcbfbff

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

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/51a7dd9cbae9210335ce398642ecaaa52c939eb5

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

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/707cb5df3eab32ddc52979418f7ace62941e6381

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

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/8d44391a7f29e4601e8243f13498d0219bab2576

    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.