CVE-2026-97502

/// Technical description

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

mmc: davinci: avoid NULL deref of host->data in IRQ handler

mmc_davinci_irq() returns early only when both host->cmd and

host->data are NULL:

if (host->cmd == NULL && host->data == NULL) {

...

return IRQ_NONE;

}

So we may legitimately reach the rest of the handler with

host->data == NULL (and therefore data == NULL). The DATDNE branch

already guards against this with an explicit "if (data != NULL)"

check, but the subsequent TOUTRD ("read data timeout") and

CRCWR/CRCRD ("data CRC error") branches dereference data

unconditionally:

if (qstatus & MMCST0_TOUTRD) {

data->error = -ETIMEDOUT; <-- NULL deref

...

davinci_abort_data(host, data);

}

if (qstatus & (MMCST0_CRCWR | MMCST0_CRCRD)) {

data->error = -EILSEQ; <-- NULL deref

...

}

If either bit is set in qstatus while host->data is NULL, the kernel

will crash inside the

/// 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