CVE-2025-38336

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

ata: pata_via: Force PIO for ATAPI devices on VT6415/VT6330

The controller has a hardware bug that can hard hang the system when

doing ATAPI DMAs without any trace of what happened. Depending on the

device attached, it can also prevent the system from booting.

In this case, the system hangs when reading the ATIP from optical media

with cdrecord -vvv -atip on an _NEC DVD_RW ND-4571A 1-01 and an

Optiarc DVD RW AD-7200A 1.06 attached to an ASRock 990FX Extreme 4,

running at UDMA/33.

The issue can be reproduced by running the same command with a cygwin

build of cdrecord on WinXP, although it requires more attempts to cause

it. The hang in that case is also resolved by forcing PIO. It doesn't

appear that VIA has produced any drivers for that OS, thus no known

workaround exists.

HDDs attached to the controller do not suffer from any DMA issues.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References