{"id":"CVE-2026-89848","summary":"scsi: qla2xxx: Quiesce response IRQ before freeing request queue","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Quiesce response IRQ before freeing request queue\n\nqla2xxx_delete_qpair() deletes the request queue before the response\nqueue. qla25xx_delete_req_que() frees the request queue memory\n(kfree(req) in qla25xx_free_req_que()), but the response-queue MSI-X is\nonly released later, in qla25xx_free_rsp_que(). In that window the\nresponse interrupt can still fire, qla2xxx_msix_rsp_q() queues\nqpair-\u003eq_work, and qla_do_work() -\u003e qla24xx_process_response_queue()\ndereferences the now-freed rsp-\u003ereq (LOGINOUT/CT/ELS entries and the\nstatus path), a use-after-free.\n\nThe cancel_work_sync() added for the qpair teardown lives in the\nresponse free path, which runs after the request queue is already freed,\nso it does not protect rsp-\u003ereq.\n\nRelease the response-queue interrupt and flush qpair-\u003eq_work before\ndeleting the request queue, so no late completion can reach the freed\nrequest queue. Clearing have_irq makes the subsequent\nqla25xx_free_rsp_que() skip its free_irq(), and the firmware\nqueue-delete order (request then response) is preserved; the\nrequest-delete mailbox completes on the default vector and is unaffected\nby dropping the qpair response interrupt early.","modified":"2026-09-18T03:48:33.564120998Z","published":"2026-09-16T10:31:22.197Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89848.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/10e9f05f7fd0a103886a867ec8afe621fe4b906a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1486cc18be3e2b4c2a730f4a1b0448d009381b3d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/157ca7d1af45f87aa14a286754f19c3f72386988"},{"type":"WEB","url":"https://git.kernel.org/stable/c/505753ec2594c6af09a601f0dd60be7d840c1d2d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7ac5be2a8609679fc6bbfea881360444a5ce8202"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89848.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89848"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d74595278f4ab192af66d9e60a9087464638beee"},{"fixed":"7ac5be2a8609679fc6bbfea881360444a5ce8202"},{"fixed":"1486cc18be3e2b4c2a730f4a1b0448d009381b3d"},{"fixed":"10e9f05f7fd0a103886a867ec8afe621fe4b906a"},{"fixed":"157ca7d1af45f87aa14a286754f19c3f72386988"},{"fixed":"505753ec2594c6af09a601f0dd60be7d840c1d2d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89848.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.10.0"},{"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-2026-89848.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}