{"id":"CVE-2026-89847","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-89847","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Avoid double completion in async IOCB timeout\n\nqla2x00_async_iocb_timeout() tries to abort a timed-out…","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Avoid double completion in async IOCB timeout\n\nqla2x00_async_iocb_timeout() tries to abort a timed-out async IOCB. When\nqla24xx_async_abort_cmd() fails, both the SRB_LOGIN_CMD path and the\nSRB_CTRL_VP/default path scan outstanding_cmds[] for the SRB and then\ncall sp->done(sp, QLA_FUNCTION_TIMEOUT) unconditionally, without checking\nwhether the SRB was actually found and removed.\n\nIf the response ISR completes the same handle first, it removes the SRB\nunder qp_lock_ptr and runs sp->done() -> complete(sp->comp). The\nsubmitter qla24xx_control_vp() wakes from wait_for_completion(), clears\nsp->comp, drops its reference and returns, reclaiming the on-stack\ncompletion. The timer reference keeps the SRB alive across the timeout\nhandler, but not the submitter's stack. The timeout then issues a second\nsp->done() -> qla_ctrlvp_sp_done(), which evaluates \"if (sp->comp)\ncomplete(sp->comp)\"; with the pointer loaded before the submitter's NULL\nstore, complete() writes into the freed stack frame, a use-after-free.\n\nTrack whether this path removed the SRB from outstanding_cmds and only\ncall sp->done() when it did, so the command is completed exactly once by\nwhichever path owns it. This mirrors the sp_found guard already used in\nqla24xx_abort_iocb_timeout().","published":"2026-09-16T11:16:51.990","modified":"2026-09-16T11:16:51.990","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/6e217a9482eabbd8b29847be334c74cf468d3544"},{"type":"WEB","url":"https://git.kernel.org/stable/c/71a7b6e3c7f121439f51a058e53d4a8e05b63dec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7257b5e1fb6c9387714f66e01b79ec82b717eede"},{"type":"WEB","url":"https://git.kernel.org/stable/c/845d4abd92cd2f97551356c8b281ad6e197acb07"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9fa1d71233a82416492d9c9de9756ebe140fe714"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d6d856c722f40f0694ff755208552e658db6dd42"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f5b660e0b0d9190d8853c795c2522cc5f8c93003"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T11:16:51.990"}}