CVE-2026-89858

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

scsi: qla2xxx: Bound image count in qla2x00_update_fru_versions()

qla2x00_update_fru_versions() copies the user-supplied BSG request into

a fixed 256-byte stack buffer (bsg[DMA_POOL_SIZE]) and then iterates

list->count times over the qla_image_version array embedded in that

buffer, advancing the image pointer each iteration. count is taken

directly from user input with no upper bound, while only (DMA_POOL_SIZE

- sizeof(list->count)) / sizeof(struct qla_image_version) = 6 entries

actually fit. A larger count walks the image pointer off the end of the

stack buffer, reading adjacent kernel stack memory and sending it to the

device via qla2x00_write_sfp().

Reject requests whose declared count does not fit in the buffer.