CVE-2026-89854

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-89854

Key Details

CVE	CVE-2026-89854
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89854
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89854

Source

Reference

NVD

CVE