CVE-2024-56771

What it actually does

Incorrectly registers a get_status callback on specific Winbond SPI NAND chips that use on-die Hamming ECC, causing a kernel warning on every corrected single-bit flip because the driver attempts unsupported status retrieval.

Why it matters to the business

Produces repeated kernel log warnings on systems using affected flash chips, increasing noise in logs and complicating monitoring or debugging on embedded and storage devices without providing any functional benefit.

How an attack unfolds

No remote or privilege-escalation exploitation path exists; the issue manifests only when the kernel performs read operations on the listed Winbond chips and encounters a correctable bit flip, at which point the warning is emitted.

How to fix it

Update the Linux kernel to a version containing the fix for the spinand winbond ECC handling; no user-space configuration changes are required.

How to confirm the fix worked

After patching, confirm absence of the warning by exercising reads on the affected chips and checking that no warning is emitted for single-bit corrections; verify the driver source no longer registers get_status for these part numbers.

Typical attack path

1. Identify or provision a system containing one of the affected Winbond NAND parts
2. Perform read operations that trigger on-die ECC correction
3. Observe the resulting kernel warning in dmesg or logs

How to detect it

Search kernel logs and dmesg output for repeated warnings related to spinand ECC status retrieval on Winbond devices; no network or file-based indicators are present.

What your security team should do

• Prioritize kernel updates on any systems using W25N512GW, W25N01GW, W25N01JW or W25N02JW parts
• Review kernel logs for pre-existing warnings matching the described pattern to quantify exposure
• Apply the fix during the next maintenance window; no emergency action needed given low severity and lack of KEV listing