CVE-2026-89854scsi: qla2xxx: Fix cs84xx use-after-free on host teardown
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 8c1ebcade6aac58137f2645b579894301febabf3; from fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 1d8bbc4344b9367d9d54731475d745fbc9ea28f2; from fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 2c3b17ee53f034936f7398dbf4d143e608b7c35c; from fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before ae09260be7454ed7630a913f147591a25e3a9d09; from fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before fcf0804dfe05862007189ac9dc4dc2063be36de1; from fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 8286a9095fb59751fba171afa2b4f590271c87d5; from fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 122bf170c94a3797531b12fee580639a5dc893ed; from fe1b806f4f7172b1eae18ddeebb7d8fb351043f7 before 33d102102d925357c5fd172dd6672a27d74b3215 | CNA record |
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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.