CVE-2026-89847

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

scsi: qla2xxx: Avoid double completion in async IOCB timeout

qla2x00asynciocb_timeout() tries to abort a timed-out async IOCB. When

qla24xxasyncabortcmd() fails, both the SRBLOGIN_CMD path and the

SRBCTRLVP/default path scan outstanding_cmds[] for the SRB and then

call sp->done(sp, QLAFUNCTIONTIMEOUT) unconditionally, without checking

whether the SRB was actually found and removed.

If the response ISR completes the same handle first, it removes the SRB

under qplockptr and runs sp->done() -> complete(sp->comp). The

submitter qla24xxcontrolvp() wakes from waitforcompletion(), clears

sp->comp, drops its reference and returns, reclaiming the on-stack

completion. The timer reference keeps the SRB alive across the timeout

handler, but not the submitter's stack. The timeout then issues a second

sp->done() -> qlactrlvpsp_done(), which evaluates "if (sp->comp)

complete(sp->comp)"; with the pointer loaded before the submitter's NULL

store, complete() writes into the freed stack frame, a use-after-free.

Track whether this path removed the SRB from outstanding_cmds and only

call sp->done() when it did, so the command is completed exactly once by

whichever path owns it. This mirrors the sp_found guard already used in

qla24xxabortiocb_timeout().