CVE-2026-89584

Updated on 11 Sep 2026

Severity

7.8 High severity

Details

CVSS score
7.8
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Overview

About vulnerability

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.

Details

Affected product:
Debian 10 ELS , Debian 11 ELS
Affected packages:
linux @ 5.10.259 (+1 more)

Fixes