CVE-2025-68823
kernel: Linux kernel: Denial of Service in ublk due to deadlock when reading partition table
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · January 13, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's ublk driver. A local attacker, by opening a ublk block device to read its partition table, could trigger a deadlock. This vulnerability leads to a Denial of Service (DoS) as the same task waits for a mutex it already holds, preventing further operations.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-833 · Deadlock