CVE-2026-89584

block: validate user space vectors during extraction

State: Published
Severity: 7.8 High
Published: Sep 11, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

Description

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

block: validate user space vectors during extraction

The bio-based drivers don't necessarily check the alignment split, and stacking block drivers don't always handle a misalignment detected after submitting the bio. Validate user vectors against the device's dma_alignment as the bio is built from the iov_iter, rejecting misaligned early with -EINVAL.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	5ff3f74e145adc79b49668adb8de276446acf6be to before d44a97a3b1c00cc571245124e23e5ceb0a0225a0Affected 5ff3f74e145adc79b49668adb8de276446acf6be to before 14b007e178811db72fbb1ebb3535160db6ec1e6aAffected
LinuxLinux	6.18Affected before 6.18Not affected 7.2.4 through 7.2.*Not affected 7.3 and laterNot affected

References

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