CVE-2026-89849scsi: qla2xxx: Reject non-SCSI SRB on status IOCB fast path

Official description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Reject non-SCSI SRB on status IOCB fast path qla2x00_status_entry() filters out non-TYPE_SRB entries and the SRB_NVME_CMD, SRB_BIDI_CMD and SRB_TM_CMD types, then falls through to a SCSI fast path that assumes the command is an SRB_SCSI_CMD. The first thing on that path, qla_chk_edif_rx_sa_delete_pending(), and the subsequent handling both evaluate GET_CMD_SP(sp), i.e. sp->u.scmd.cmd. The srb u union overlays the SCSI command pointer with other command layouts (bsg_job, iocb_cmd). If firmware delivers an unexpected STATUS_TYPE IOCB for a non-SCSI handle, sp->u.scmd.cmd can read as a non-NULL garbage pointer, bypassing the NULL checks in qla_chk_edif_rx_sa_delete_pending() and at the cp == NULL test, and leading to a wild pointer dereference. Reject any SRB whose type is not SRB_SCSI_CMD before entering the fast path. The outstanding_cmds slot is left untouched so a genuinely non-SCSI command still completes through its proper handler.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/9204fb0888374083be74f799049649a17eab4191
• https://git.kernel.org/stable/c/b7418198b45b327194b97f856fe8ea8daa91f3fd
• https://git.kernel.org/stable/c/8f0e31e7a41376abe7d6ca7cbee07fcf9de071e6
• https://git.kernel.org/stable/c/e38041b47c29316ba79b645e2ae0b713d216b1db
• https://git.kernel.org/stable/c/e93aa3c5125d9a4352ac0fa8ba4a7f8f87881805
• https://git.kernel.org/stable/c/29f1f9ad9e354cd0b6e4f6fc75ba09162d6a04d9
• https://git.kernel.org/stable/c/0f41d07d72f2245208c45374ca8d0a1846cad667