SB2026011454 - Improper locking in Linux kernel block driver
Published: January 14, 2026
Security Bulletin ID
SB2026011454
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 security vulnerability.
1) Improper locking (CVE-ID: CVE-2025-68823)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the ublk_get_uring_cmd_pdu(), __ublk_complete_rq(), __ublk_abort_rq() and __ublk_do_auto_buf_reg() functions in drivers/block/ublk_drv.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.