SB20260918240 - NULL pointer dereference in Linux kernel ufs core driver
Published: September 18, 2026
Security Bulletin ID
SB20260918240
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-92479)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the UFS completion handler ufshcd_compl_one_cqe() when processing an invalid completion tag with no associated command. A local user can trigger processing of an invalid completion tag to cause a denial of service.
The issue occurs in the single-doorbell completion path.
Remediation
Install update from vendor's website.