CVE-2024-27030

What it actually does

Race condition in octeontx2-af interrupt handling where the same handler is registered for both PF-to-AF and VF-to-AF vectors, allowing concurrent processing on separate CPUs to corrupt shared data structures.

Why it matters to the business

Systems using affected Linux kernel versions on OcteonTX2 hardware risk instability, crashes, or corrupted network state that can disrupt operations until the kernel is updated.

How an attack unfolds

An attacker able to trigger simultaneous PF and VF interrupts on different CPUs can cause the shared handler to process the same event concurrently, leading to data corruption; no public exploitation or named threat actors are associated with this issue.

How to fix it

Update the Linux kernel to the version containing commit 94cb17e5cf3a3c484063abc0ce4b8a2b2e8c1cb2 or later; apply the separate interrupt handler fix for PF-to-AF and VF-to-AF vectors.

How to confirm the fix worked

Confirm the running kernel contains commit 94cb17e5cf3a3c484063abc0ce4b8a2b2e8c1cb2 and verify that distinct handlers are registered for PF-to-AF and VF-to-AF interrupt vectors.

Typical attack path

1. Obtain local or privileged access on an affected OcteonTX2 system
2. Trigger PF-to-AF and VF-to-AF interrupts concurrently on separate CPUs
3. Exploit resulting data corruption for denial of service or further impact

How to detect it

Review kernel logs for signs of interrupt handler races or data corruption in octeontx2-af; examine dmesg and /proc/interrupts for unexpected concurrent handler activity on affected hardware.

What your security team should do

• Prioritize kernel updates on all OcteonTX2-based systems within standard patching cycles
• Monitor vendor advisories for backported fixes in distribution kernels
• Test updated kernels in staging environments before broad deployment