CVE-2025-68348

kernel: Linux kernel: Memory leak in block subsystem can lead to denial of service

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · December 24, 2025

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel. A local user could trigger a memory leak in the __blkdev_issue_zero_pages function within the block subsystem. This occurs when a fatal signal is pending and a block I/O (bio) is allocated but not properly freed, leading to resource exhaustion. This vulnerability can result in a Denial of Service (DoS).

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-772 · Missing Release of Resource after Effective Lifetime