CVE-2026-98762 Linux CVE debrief

Who should care

Linux kernel developers, administrators responsible for maintaining and securing Linux-based systems, and security teams should be aware of this vulnerability. They should verify Linux kernel versions, apply patches, and monitor system logs for potential issues. Affected systems may include those using the dwc2 USB driver in Linux kernel deployments. Operational impacts include potential timer rearm and host state access issues if not properly patched.

Why it matters

The Linux kernel vulnerability CVE-2026-98762 requires verification of Linux kernel version and patch application to prevent potential timer rearm and host state access issues.

• Verify Linux kernel version to ensure patch application
• Monitor system logs for potential timer rearm and host state access issues
• Apply patches to prevent potential vulnerability exploitation

Technical summary

The Linux kernel vulnerability was resolved by shutting down the wakeup timer before freeing HCD state in the dwc2_hcd_release() function. This fix prevents potential timer rearming and access to freed host state. The vulnerability affects Linux kernel deployments using the dwc2 USB driver. Defenders should focus on verifying patch application and monitoring system logs for potential issues. Technical details are based on public CVE and NVD information, which may have limitations. Additional technical analysis may be necessary to fully understand the vulnerability and its impact.

Defensive priority

Verify Linux kernel version and apply patches to prevent potential timer rearm and host state access issues.

Recommended defensive actions

• Verify Linux kernel version
• Apply patches
• Monitor system logs for potential issues
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions and retest remediated assets
• Plan vendor-supported updates or mitigations

Evidence notes

The CVE record and NVD entry provide details on the Linux kernel vulnerability and its resolution. Evidence is limited to public sources and may not be comprehensive. Defenders should verify Linux kernel versions, patch applications, and monitor system logs for potential timer rearm and host state access issues. Additional verification tasks may be necessary due to potential source limitations.

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.