{"id":"CVE-2026-89847","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-89847","generatedAt":"2026-09-20T13:19:16.143Z","title":"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.","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().","published":"2026-09-16T11:16:52.000Z","lastModified":"2026-09-16T15:18:13.000Z","status":"Received","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":[],"epss":{"score":0.00675,"percentile":0.50753,"date":"2026-09-19","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.68%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/6e217a9482eabbd8b29847be334c74cf468d3544","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/71a7b6e3c7f121439f51a058e53d4a8e05b63dec","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7257b5e1fb6c9387714f66e01b79ec82b717eede","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/845d4abd92cd2f97551356c8b281ad6e197acb07","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9fa1d71233a82416492d9c9de9756ebe140fe714","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d6d856c722f40f0694ff755208552e658db6dd42","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f5b660e0b0d9190d8853c795c2522cc5f8c93003","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89847","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}