CVE-2026-98578 Linux CVE debrief

Who should care

Defenders responsible for Linux kernel systems and NFC functionality should assess exposure and prioritize verification and patching. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify Linux kernel versions, assess exposure to NFC functionality, and review and apply patches from official sources.

Why it matters

The Linux kernel vulnerability in the nfc: st21nfca component requires verification of inventory and exposure to NFC functionality, with potential impacts on data corruption or unauthorized access.

• Verify Linux kernel versions and NFC functionality exposure
• Assess potential for data corruption or unauthorized access
• Prioritize patching and inventory verification

Technical summary

The Linux kernel has a vulnerability in the nfc: st21nfca component that has been resolved. The vulnerability involves validating the ISO15693 inventory length, which could lead to data corruption or unauthorized access if not properly addressed. The vulnerability requires verification of inventory and exposure to NFC functionality, with potential impacts on data corruption or unauthorized access. Defenders should review the official CVE Program record and NIST NVD detail page for detailed information on this vulnerability and assess the potential impact on their systems.

Defensive priority

Defenders should prioritize verifying the inventory of Linux kernel versions and assessing exposure to NFC functionality.

Recommended defensive actions

• Verify Linux kernel versions in inventory
• Assess exposure to NFC functionality
• Review and apply patches from official sources
• 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
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The vulnerability was resolved in the Linux kernel, and multiple source references are provided for further information. The official CVE Program record and NIST NVD detail page provide information on this vulnerability. Defenders should verify Linux kernel versions in their inventory, assess exposure to NFC functionality, and review and apply patches from official sources. The CVE record was published on 2026-10-18T16:17:10.223Z and has not been modified since then. The source references provide additional information on the affected

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.