CVE-2026-98614 Linux CVE debrief

Who should care

Linux kernel maintainers, Linux distribution maintainers, and users of Linux kernel versions that may be affected by this vulnerability should assess exposure and verify patch deployment.

Why it matters

CVE-2026-98614 is a livelock vulnerability in the Linux kernel's SCTP retransmit path update process. Linux kernel maintainers and users should assess exposure and verify patch deployment to prevent potential livelock conditions.

• Verify patch deployment for affected Linux kernel versions to prevent potential livelock conditions
• Assess exposure to CVE-2026-98614 in Linux kernel versions
• Monitor Linux kernel updates for potential future vulnerabilities related to SCTP retransmit path update process

Technical summary

The Linux kernel SCTP retransmit path update process is vulnerable to a livelock condition. The issue arises when the state check runs before the wraparound test, causing the loop to observe that it has completed a full pass. This results in an infinite loop when updating the retransmit path under certain conditions. The vulnerability was addressed by considering a transport only when it is not UNCONFIRMED, then checking whether the walk has returned to retran_path. This makes the full-pass termination independent of the transport state while preserving the existing fallback selection semantics.

Defensive priority

Linux kernel maintainers and users should assess exposure and verify patch deployment.

Recommended defensive actions

• Review Linux kernel versions and assess exposure to CVE-2026-98614
• Verify patch deployment for affected Linux kernel versions
• Monitor Linux kernel updates for potential future vulnerabilities
• 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
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• 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. However, specific exploitation or impact details are not provided, and verification is required. The Linux kernel's SCTP implementation is used for reliable data transfer, and the livelock condition can occur when the state check runs before the wraparound test. The vulnerability was addressed by considering a transport only when it is not UNCONFIRMED, then checking whether the walk has returned to retran_path. This makes the full-pass termination independent of the

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.