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Linux Kernel CVE-2026-43248

| EUVD-2026-27809 HIGH
Out-of-bounds Write (CWE-787)
2026-05-06 Linux GHSA-xpcf-mwvf-62v9
7.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
May 08, 2026 - 13:42 vuln.today
CVSS changed
May 08, 2026 - 13:22 NVD
7.8 (HIGH)
Patch available
May 06, 2026 - 13:32 EUVD
CVE Published
May 06, 2026 - 11:28 nvd
HIGH 7.8

DescriptionNVD

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

vhost: move vdpa group bound check to vhost_vdpa

Remove duplication by consolidating these here. This reduces the posibility of a parent driver missing them.

While we're at it, fix a bug in vdpa_sim where a valid ASID can be assigned to a group equal to ngroups, causing an out of bound write.

AnalysisAI

Out-of-bounds write in Linux kernel vhost_vdpa subsystem allows local authenticated users to achieve arbitrary kernel memory corruption via ASID group assignment. Affects Linux kernel versions 5.19 through 6.19.x, with vendor patches available for stable branches 6.12.75, 6.18.16, 6.19.6, and mainline 7.0. …

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RemediationAI

Within 24 hours: Inventory all systems running Linux kernel versions 5.19-6.19.x and identify those exposed to local authenticated user access. Within 7 days: Apply vendor patches to stable branches (6.12.75, 6.18.16, 6.19.6) or mainline kernel 7.0 on non-critical systems; prioritize systems with broad local user access. …

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Vendor StatusVendor

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CVE-2026-43248 vulnerability details – vuln.today

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