SB20260912346 - Use-after-free in Linux kernel mmc host driver
Published: September 12, 2026
Security Bulletin ID
SB20260912346
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-2026-89441)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause a use-after-free condition.
The vulnerability exists due to a use-after-free in carddet_work in the VIA SD/MMC driver when queued card-detect work executes after driver removal. A local privileged user can trigger device removal while card-detect work is pending to cause a use-after-free condition.
Remediation
Install update from vendor's website.