CVE-2026-15923

The Zephyr SDIO subsystem function sdioiorwextendedhelper in subsys/sd/sdio.c finishes transfers with a byte-I/O loop that uses size = MINremaining, func-cis.maxblksize as the per-iteration step. The value func-cis.maxblksize is decoded directly from the SDIO card's CIS FUNCE tuple in sdiodecodec...

CVE-2026-15923 Infinite loop denial of service in Zephyr SDIO byte-I/O from a card-supplied zero max_blk_size

The Zephyr SDIO subsystem function sdioiorwextendedhelper in subsys/sd/sdio.c finishes transfers with a byte-I/O loop that uses size = MINremaining, func-cis.maxblksize as the per-iteration step. The value func-cis.maxblksize is decoded directly from the SDIO card's CIS FUNCE tuple in sdiodecodec...

CVE-2026-15923

CVE-2026-15923 is a denial-of-service vulnerability in the Zephyr RTOS SDIO subsystem. The function sdio_io_rw_extended_helper() in subsys/sd/sdio.c uses func->cis.max_blk_size—decoded from a card's CIS FUNCE tuple without validation —as the per-iteration step in a byte-I/O loop. When a card r...

EUVD-2026-77629

The Zephyr SDIO subsystem function sdioiorwextendedhelper in subsys/sd/sdio.c finishes transfers with a byte-I/O loop that uses size = MINremaining, func-cis.maxblksize as the per-iteration step. The value func-cis.maxblksize is decoded directly from the SDIO card's CIS FUNCE tuple in sdiodecodec...