{"id":"CVE-2026-89854","published":"2026-09-16T11:16:53.180","lastModified":"2026-09-16T15:18:13.367","description":"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.","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/122bf170c94a3797531b12fee580639a5dc893ed","tags":[]},{"url":"https://git.kernel.org/stable/c/1d8bbc4344b9367d9d54731475d745fbc9ea28f2","tags":[]},{"url":"https://git.kernel.org/stable/c/2c3b17ee53f034936f7398dbf4d143e608b7c35c","tags":[]},{"url":"https://git.kernel.org/stable/c/33d102102d925357c5fd172dd6672a27d74b3215","tags":[]},{"url":"https://git.kernel.org/stable/c/8286a9095fb59751fba171afa2b4f590271c87d5","tags":[]},{"url":"https://git.kernel.org/stable/c/8c1ebcade6aac58137f2645b579894301febabf3","tags":[]},{"url":"https://git.kernel.org/stable/c/ae09260be7454ed7630a913f147591a25e3a9d09","tags":[]},{"url":"https://git.kernel.org/stable/c/fcf0804dfe05862007189ac9dc4dc2063be36de1","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}