CVE-2025-68348

Not scored yetLast modified Oct 19, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

block: fix memory leak in __blkdev_issue_zero_pages

Move the fatal signal check before bio_alloc() to prevent a memory leak when BLKDEV_ZERO_KILLABLE is set and a fatal signal is pending.

Previously, the bio was allocated before checking for a fatal signal. If a signal was pending, the code would break out of the loop without freeing or chaining the just-allocated bio, causing a memory leak.

This matches the pattern already used in __blkdev_issue_write_zeroes() where the signal check precedes the allocation.

Metrics

No CVSS score has been published yet.

Affected software

No affected versions have been published.

Timeline

Published
Dec 24, 2025
Last modified
Oct 19, 2026
NVD status
Deferred

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CVE-2025-68348: Unscored | Vulnix