CVE-2026-98760 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution vendors, and organizations using Linux-based systems with USB Type-C ports should assess exposure and apply patches or mitigations as needed.

Why it matters

A vulnerability in the Linux kernel's USB Type-C driver has been addressed. Linux kernel developers, maintainers, and users should verify patch application and assess exposure to ensure system security.

• Potential unexpected behavior or crashes when USB devices are connected to affected systems.
• Possible exposure of sensitive data through uninitialized stack memory.
• Verification of kernel patch application and system configuration is necessary to ensure vulnerability mitigation.

Technical summary

The tps6598x_connect() function in the Linux kernel's USB Type-C driver (tipd) did not fully initialize the typec_partner_desc structure before passing it to typec_register_partner(). This could lead to garbage function pointers being stored and invoked later when a USB device is linked to the port. The issue could result in unexpected behavior or crashes when USB devices are connected to affected systems, and may expose sensitive data through uninitialized stack memory. Linux kernel developers, maintainers, and users should verify patch application and assess exposure to ensure system security.

Defensive priority

Medium

Recommended defensive actions

• Review and apply the kernel patch to ensure the tps6598x_connect() function properly initializes the typec_partner_desc structure.
• Verify the Linux kernel version and check if the patch has been applied.
• Monitor system logs for any suspicious activity related to USB device connections.
• Perform a thorough review of system configurations and USB device connections to identify potential exposure.
• Implement compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Review relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD entry provide details about the vulnerability. However, the scope of affected systems and potential impact require further verification from official sources. Affected Linux kernel deployments should be reviewed for exposure, and defenders should verify patch application and system configuration to ensure vulnerability mitigation. Additional details may be found in official kernel documentation and security advisories.

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.