Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix cs84xx use-after-free on host teardown qla84xx_put_chip() drops the last reference to ha->cs84xx and frees it via __qla84xx_chip_release() without clearing ha->cs84xx. During teardown it ran before scsi_remove_host(), which is what removes the 84xx_fw_version host sysfs attribute. A concurrent read of that attribute in the window between the two calls executes qla24xx_84xx_fw_version_show(), which dereferences the freed ha->cs84xx, resulting in a use-after-free. Move qla84xx_put_chip() to after scsi_remove_host() in both qla2x00_remove_one() and qla2x00_disable_board_on_pci_error(). Once scsi_remove_host() returns, the sysfs attribute is gone and kernfs has drained any in-flight show(), so no reader can touch cs84xx; the put still runs before the host and ha are freed.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 8c1ebcade6aac58137f2645b579894301febabf3; affected fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 1d8bbc4344b9367d9d54731475d745fbc9ea28f2; affected fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 2c3b17ee53f034936f7398dbf4d143e608b7c35c; affected fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before ae09260be7454ed7630a913f147591a25e3a9d09; affected fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before fcf0804dfe05862007189ac9dc4dc2063be36de1; affected fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 8286a9095fb59751fba171afa2b4f590271c87d5; affected fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 122bf170c94a3797531b12fee580639a5dc893ed; affected fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 33d102102d925357c5fd172dd6672a27d74b3215 |
| Linux / Linux | affected 3.14; unaffected 0 before 3.14; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8c1ebcade6aac58137f2645b579894301febabf3
- https://git.kernel.org/stable/c/1d8bbc4344b9367d9d54731475d745fbc9ea28f2
- https://git.kernel.org/stable/c/2c3b17ee53f034936f7398dbf4d143e608b7c35c
- https://git.kernel.org/stable/c/ae09260be7454ed7630a913f147591a25e3a9d09
- https://git.kernel.org/stable/c/fcf0804dfe05862007189ac9dc4dc2063be36de1
- https://git.kernel.org/stable/c/8286a9095fb59751fba171afa2b4f590271c87d5
- https://git.kernel.org/stable/c/122bf170c94a3797531b12fee580639a5dc893ed
- https://git.kernel.org/stable/c/33d102102d925357c5fd172dd6672a27d74b3215