CVE-2026-89847

Status: UPDATED  |  Advisory ID: CVE-2026-89847

Key Details

Affected Products, Subsystems & Sectors

What to Know

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

scsi: qla2xxx: Avoid double completion in async IOCB timeout

qla2x00_async_iocb_timeout() tries to abort a timed-out async IOCB. When

qla24xx_async_abort_cmd() fails, both the SRB_LOGIN_CMD path and the

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

call sp->done(sp, QLA_FUNCTION_TIMEOUT) 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 qp_lock_ptr and runs sp->done() -> complete(sp->comp). The

submitter qla24xx_control_vp() wakes from wait_for_completion(), 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() -> qla_ctrlvp_sp_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

qla24xx_abort_iocb_timeout(). (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References