Improper input validation in Linux kernel - CVE-2026-74703
Published: August 24, 2026
Vulnerability identifier: #VU144638
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74703
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper input validation in the vhost-scsi request handling logic when processing a malformed request with negotiated T10 PI protection bytes. A local user can send a specially crafted request to cause a denial of service.
The issue is triggered when protection bytes cover or exceed the expected payload length, allowing a zero data scatterlist count to reach a BUG_ON condition.
Affected software
Linux kernel
How to mitigate CVE-2026-74703
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3