SB2026091931 - Use-after-free in Linux kernel block mtip32xx driver
Published: September 19, 2026
Security Bulletin ID
SB2026091931
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-90180)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger a use-after-free condition.
The vulnerability exists due to use-after-free in the mtip32xx ioctl handlers when an ioctl races with device removal. A local user can issue an ioctl against an already open block device during device removal to trigger a use-after-free condition.
The issue affects both native and compatibility ioctl handlers.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/4609e0e0be709e974bec9b52c5022136d25e97d3
- https://git.kernel.org/stable/c/521afbd936ac256b7531470b0b9aa96abf9cd853
- https://git.kernel.org/stable/c/68940f841d013192086a0f6d7cfbac2cd079e228
- https://git.kernel.org/stable/c/8283049aa5fcb4e84b2b2928b2888903bb8ee12e
- https://git.kernel.org/stable/c/8a7799597bd683b6bc251fe2edfa9fd1db568a3a
- https://git.kernel.org/stable/c/b389dc35a55713ac24a145741e76196fea1663bc