CVE-2026-98062 Linux CVE debrief

Who should care

Linux kernel developers, administrators, and security teams should assess exposure and verify remediation for systems using the affected kernel versions. They should review Linux kernel versions and configurations for exposure, verify remediation through official kernel updates, and monitor system logs for potential exploitation attempts. Additionally, they should track exceptions, retest remediated assets, and close the item only after evidence is  

Why it matters

A Linux kernel vulnerability has been resolved, involving the signal_generate and signal_deliver tracepoints. Linux kernel developers and administrators should assess exposure and verify remediation for systems using the affected kernel versions.

• Verification of kernel version and configuration exposure
• Remediation through official kernel updates
• Monitoring system logs for potential exploitation attempts

Technical summary

The signal_generate and signal_deliver tracepoints in the Linux kernel have been updated to prevent tp_btf programs from treating the info argument as a trusted pointer. This change addresses a potential kernel panic issue that could arise when tp_btf programs dereference special values (SEND_SIG_NOINFO and SEND_SIG_PRIV) used for signal delivery. These special values are not pointers and could cause a kernel fault if dereferenced. By recording both tracepoints in raw_tp_null_args[] and marking argument one as a non-pointer, the update preserves scalar access to the cookie while rejecting direct and helper-mediated pointer use.

Defensive priority

Linux kernel developers and administrators should assess exposure and verify remediation for systems using the affected kernel versions.

Recommended defensive actions

• Review Linux kernel versions and configurations for exposure
• Verify remediation through official kernel updates
• Monitor system logs for potential exploitation attempts
• Track exceptions and retest remediated assets
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but evidence is limited. The CVE Program and NVD offer official records, while kernel.org provides source references. Linux kernel developers and administrators should verify kernel versions, assess exposure, and confirm remediation through official kernel updates or mitigations. They should also monitor system logs for potential exploitation attempts and review compensating controls for exposed systems.

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.