CVE-2026-90026 Linux CVE debrief

Who should care

Linux kernel maintainers, users, and administrators should assess exposure and prioritize patching to prevent potential system crashes or instability. The vulnerability can lead to system instability or crashes if exploited. The affected operator, platform, vulnerability-management, and security-team impact should be reviewed. Compensating controls should be reviewed for exposed systems while remediation is scheduled and verified.

Why it matters

A use-after-free vulnerability in the Linux kernel's USB type-c qcom-pmic driver requires patching or updates to prevent potential system crashes or instability.

• Potential system crashes or instability
• Possible elevation of privileges
• Required patching or updates for Linux kernel
• Verification of Linux kernel versions and exposure

Technical summary

The Linux kernel's USB type-c qcom-pmic driver has a use-after-free vulnerability. The pdphy_stop() function disables IRQs but leaves reset_work pending, potentially causing a use-after-free error if the IRQ handler schedules it just before disable_irq(). This vulnerability can lead to system instability or crashes if exploited. The issue requires patching or updates to prevent potential system crashes or instability. The affected product deployments should be reviewed, and owners should be assigned for follow-up. The official advisory or CVE record should be reviewed to validate affected scope, severity, and vendor guidance.

Defensive priority

Linux kernel maintainers and users should assess exposure and prioritize patching.

Recommended defensive actions

• Review Linux kernel versions and assess exposure
• Apply patches or updates from Linux kernel maintainers
• Monitor system logs for potential use-after-free errors
• Verify Linux kernel versions and configurations
• Check for compensating controls
• Track exceptions and retest remediated assets
• Review relevant monitoring and detection logs

Evidence notes

The issue was found by an in-house static analysis tool. The CVE record and Linux kernel source code provide details on the vulnerability. The analysis suggests that the vulnerability could lead to system crashes or instability if exploited. Further verification is required to confirm the affected scope and severity. The Linux kernel maintainers have provided patches to address this issue.

Sources and references

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.