{"id":"CVE-2026-89854","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-89854","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix cs84xx use-after-free on host teardown\n\nqla84xx_put_chip() drops the last reference to ha->cs84xx…","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix cs84xx use-after-free on host teardown\n\nqla84xx_put_chip() drops the last reference to ha->cs84xx and frees it via\n__qla84xx_chip_release() without clearing ha->cs84xx. During teardown it ran\nbefore scsi_remove_host(), which is what removes the 84xx_fw_version host\nsysfs attribute. A concurrent read of that attribute in the window between\nthe two calls executes qla24xx_84xx_fw_version_show(), which dereferences\nthe freed ha->cs84xx, resulting in a use-after-free.\n\nMove qla84xx_put_chip() to after scsi_remove_host() in both\nqla2x00_remove_one() and qla2x00_disable_board_on_pci_error(). Once\nscsi_remove_host() returns, the sysfs attribute is gone and kernfs has\ndrained any in-flight show(), so no reader can touch cs84xx; the put still\nruns before the host and ha are freed.","published":"2026-09-16T11:16:53.180","modified":"2026-09-16T11:16:53.180","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/122bf170c94a3797531b12fee580639a5dc893ed"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1d8bbc4344b9367d9d54731475d745fbc9ea28f2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2c3b17ee53f034936f7398dbf4d143e608b7c35c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/33d102102d925357c5fd172dd6672a27d74b3215"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8286a9095fb59751fba171afa2b4f590271c87d5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8c1ebcade6aac58137f2645b579894301febabf3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ae09260be7454ed7630a913f147591a25e3a9d09"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fcf0804dfe05862007189ac9dc4dc2063be36de1"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-16T11:16:53.180"}}