Bug 2532265 (CVE-2026-89584) - CVE-2026-89584 kernel: block: validate user space vectors during extraction
Summary: CVE-2026-89584 kernel: block: validate user space vectors during extraction
Keywords:
Status: NEW
Alias: CVE-2026-89584
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-11 21:48 UTC by OSIDB Bzimport
Modified: 2026-09-18 17:50 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-09-11 21:48:56 UTC 
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.
Comment 1 Keith Grant 2026-09-18 17:42:08 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89584.mbox
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