CVE-2026-98024 Linux CVE debrief

Who should care

Linux kernel maintainers, administrators, and users who need to ensure their kernel versions are up-to-date with the latest security patches. These stakeholders should review and apply the fix as part of their regular security update processes to prevent potential slab allocator corruption.

Why it matters

A Linux kernel vulnerability has been patched to prevent slab allocator corruption. While no exploitation is known, maintaining up-to-date kernel versions is crucial for security.

• Verification of kernel versions and patch application is necessary to prevent potential slab allocator corruption
• Monitoring for use-after-free issues in the kernel is recommended

Technical summary

The Linux kernel has been updated to use folio_put() instead of kfree() in the error exit of ism_alloc_dmb() to prevent slab allocator corruption. This change also resets dmb->cpu_addr after folio_put to avoid use-after-free issues. The fix is already included in the kernel, and no known exploitation exists. Linux kernel maintainers, administrators, and users who need to ensure their kernel versions are up-to-date with the latest security patches should review and apply the fix as part of their regular security update processes.

Defensive priority

Low priority, as the fix is already included in the kernel and no known exploitation exists.

Recommended defensive actions

• Review Linux kernel versions and ensure the fix is applied
• Monitor for any potential use-after-free issues in the kernel
• Verify kernel versions and assign an owner for follow-up
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• 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

Evidence notes

The CVE record and source references indicate a fix has been applied to the Linux kernel to address a slab allocator corruption issue. The fix involves using folio_put() instead of kfree() in the error exit of ism_alloc_dmb(). No additional information on exploitation or impact is provided. Defenders should verify kernel versions and apply the fix according to 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.