CVE-2026-98755 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution vendors, and users of Linux-based systems should be aware of this vulnerability and take steps to address it. They should verify and apply kernel updates, monitor for unusual LDC activity, and review system configurations and inventory. The scope of affected systems and versions requires verification from official sources. Defenders should prioritize verifying and applying kernel updates, as well

Why it matters

A vulnerability in the Linux kernel's tty: vcc component can lead to partial kernel stack data exposure. Defenders should verify and apply kernel updates, monitor for unusual LDC activity, and review system configurations and inventory. The scope of affected systems and versions requires verification from official sources.

• Potential exposure of kernel stack data
• Unintended information disclosure
• Verification of kernel updates and system configurations

Technical summary

The Linux kernel's tty: vcc component has a vulnerability where the stack-allocated struct vio_vcc pkt is partially initialized, potentially leaking kernel stack data to the LDC peer. This vulnerability can be mitigated by verifying and applying kernel updates, monitoring for unusual LDC activity, and reviewing system configurations and inventory. The CVE record and NVD entry provide details on the vulnerability, but the scope of affected systems and versions requires verification from official sources. Linux kernel developers and maintainers, Linux distribution vendors, and users of Linux-based systems should take these steps to address the vulnerability.

Defensive priority

Verify and apply kernel updates; monitor for unusual LDC activity

Recommended defensive actions

• Verify and apply kernel updates
• Monitor for unusual LDC activity
• Review system configurations and inventory
• 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 CVE record and NVD entry provide details on the vulnerability. However, the scope of affected systems and versions is not explicitly stated, requiring verification from official sources. Linux kernel developers and maintainers, Linux distribution vendors, and users of Linux-based systems should verify and apply kernel updates, monitor for unusual LDC activity, and review system configurations and inventory. The CVE record was published on 2026-10-18T16:17:29.300Z and has not been modified since then. The NVD entry provides a brief

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.