{"id":"CVE-2026-89847","summary":"scsi: qla2xxx: Avoid double completion in async IOCB timeout","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-\u003edone(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-\u003edone() -\u003e complete(sp-\u003ecomp). The\nsubmitter qla24xx_control_vp() wakes from wait_for_completion(), clears\nsp-\u003ecomp, 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-\u003edone() -\u003e qla_ctrlvp_sp_done(), which evaluates \"if (sp-\u003ecomp)\ncomplete(sp-\u003ecomp)\"; 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-\u003edone() 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().","modified":"2026-09-17T03:47:19.782497705Z","published":"2026-09-16T10:31:21.286Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89847.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"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"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89847.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89847"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f6145e86d21fccd59bbb87bc1e1eb076658fd79a"},{"fixed":"71a7b6e3c7f121439f51a058e53d4a8e05b63dec"},{"fixed":"7257b5e1fb6c9387714f66e01b79ec82b717eede"},{"fixed":"f5b660e0b0d9190d8853c795c2522cc5f8c93003"},{"fixed":"6e217a9482eabbd8b29847be334c74cf468d3544"},{"fixed":"d6d856c722f40f0694ff755208552e658db6dd42"},{"fixed":"9fa1d71233a82416492d9c9de9756ebe140fe714"},{"fixed":"845d4abd92cd2f97551356c8b281ad6e197acb07"},{"fixed":"bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89847.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.19.0"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89847.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}