CVE-2026-98499 Linux CVE debrief

Who should care

Linux kernel administrators and developers, especially those handling HID devices, should assess exposure and prioritize patching. Linux kernel deployments using the HID: wacom module are potentially affected. Operators, platform managers, vulnerability management teams, and security teams should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Why it matters

CVE-2026-98499 is a Linux kernel vulnerability in the HID: wacom module that allows for out-of-bounds reads, potentially leading to information disclosure. Linux kernel administrators and developers, especially those handling HID devices, should assess exposure and prioritize patching.

• Information disclosure possible through MSC_SERIAL events
• Potential for memory reads beyond report boundaries
• Need for verification of affected versions and deployments
• Remediation priority for Linux kernel updates

Technical summary

The wacom_wac_pen_serial_enforce function in the Linux kernel's HID: wacom module improperly calculates and passes an invalid offset to hid_field_extract. This results in out-of-bounds memory reads, potentially leading to information disclosure. The issue arises when a field in the HID descriptor lists more usages than its Report Count reserves space for. Linux kernel administrators and developers, especially those handling HID devices, should assess exposure and prioritize patching for Linux kernel deployments using the HID: wacom module.

Defensive priority

Assess exposure and prioritize patching for Linux kernel deployments using the HID: wacom module, especially in systems handling HID devices.

Recommended defensive actions

• Assess Linux kernel deployments for HID: wacom module usage
• Prioritize patching for affected systems
• Monitor for potential information disclosure
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. Additional information from source references is needed for comprehensive understanding. Linux kernel administrators and developers should verify affected versions and deployments, assess exposure, and prioritize patching. The vulnerability allows for out-of-bounds reads, potentially leading to information disclosure through MSC_SERIAL events. Defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

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.