SB20260917105 - Use-after-free in Linux kernel scsi qla2xxx driver
Published: September 17, 2026
Security Bulletin ID
SB20260917105
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-89854)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to compromise confidentiality, integrity, and availability.
The vulnerability exists due to a use-after-free in the qla2xxx driver's 84xx_fw_version sysfs attribute handler when concurrently reading the attribute during host teardown. A local user can read the 84xx_fw_version sysfs attribute during host teardown to compromise confidentiality, integrity, and availability.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/122bf170c94a3797531b12fee580639a5dc893ed
- https://git.kernel.org/stable/c/1d8bbc4344b9367d9d54731475d745fbc9ea28f2
- https://git.kernel.org/stable/c/2c3b17ee53f034936f7398dbf4d143e608b7c35c
- https://git.kernel.org/stable/c/33d102102d925357c5fd172dd6672a27d74b3215
- https://git.kernel.org/stable/c/8286a9095fb59751fba171afa2b4f590271c87d5
- https://git.kernel.org/stable/c/8c1ebcade6aac58137f2645b579894301febabf3
- https://git.kernel.org/stable/c/ae09260be7454ed7630a913f147591a25e3a9d09
- https://git.kernel.org/stable/c/fcf0804dfe05862007189ac9dc4dc2063be36de1