{"id":"CVE-2026-89847","published":"2026-09-16T11:16:51.990","lastModified":"2026-09-16T15:18:12.967","description":"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().","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/6e217a9482eabbd8b29847be334c74cf468d3544","tags":[]},{"url":"https://git.kernel.org/stable/c/71a7b6e3c7f121439f51a058e53d4a8e05b63dec","tags":[]},{"url":"https://git.kernel.org/stable/c/7257b5e1fb6c9387714f66e01b79ec82b717eede","tags":[]},{"url":"https://git.kernel.org/stable/c/845d4abd92cd2f97551356c8b281ad6e197acb07","tags":[]},{"url":"https://git.kernel.org/stable/c/9fa1d71233a82416492d9c9de9756ebe140fe714","tags":[]},{"url":"https://git.kernel.org/stable/c/bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8","tags":[]},{"url":"https://git.kernel.org/stable/c/d6d856c722f40f0694ff755208552e658db6dd42","tags":[]},{"url":"https://git.kernel.org/stable/c/f5b660e0b0d9190d8853c795c2522cc5f8c93003","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This flaw allows a use-after-free condition in the Linux kernel's qla2xxx driver, leading to potential memory corruption.","exploitability":"Exploitation requires specific timing and conditions where an ISR completes before the timeout handler, making it moderately difficult.","blast_radius":"If exploited, this could lead to arbitrary code execution or system instability on affected systems.","remediation":"Update to a patched kernel version as soon as possible.","tags":["kernel","use-after-free","memory-corruption"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-23T08:44:00.107Z"}}