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.

• https://git.kernel.org/stable/c/047f1f7ee6f85bde28abfdda9fa550191ddc0532
• https://git.kernel.org/stable/c/7b22b4cb8822805cef7ba618da6f76e1474d68bd
• https://git.kernel.org/stable/c/7e3154c97ec15460f715dbbe4097c255cce110b1
• https://git.kernel.org/stable/c/a9706d5e754e77515a92bb532bd0d73644979a1f
• https://git.kernel.org/stable/c/af733bbfcf667af1871a2735fba2835b0da71efb
• https://git.kernel.org/stable/c/de62cf265dbe309f34f144a6cdbca9240317727e
• https://git.kernel.org/stable/c/f2d4f025b67fcbfb2bbbadd3b5a6a43c4b436514
• https://git.kernel.org/stable/c/f93e8039e6fd54a3c027c6184daf00b745b576a0