Linux Kernel vhost subsystem Vulnerability Rated 7.1 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-74703

Key Details

CVE	CVE-2026-74703
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-14
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is none; user interaction is none; scope is changed; confidentiality impact is none; integrity impact is none; availability impact is high.
Affected products	Linux Kernel
Exploitation prediction (EPSS)	0.18% probability of exploitation in the next 30 days (7% percentile) -- FIRST.org's EPSS model.

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

vhost-scsi: Validate T10 PI scatterlist counts

When T10 PI is negotiated, vhost-scsi splits protection bytes from

the data iterator before mapping the request scatterlists. A malformed

request can claim protection bytes that cover or exceed the full payload

length. The former leaves no data bytes to map, while the latter

underflows exp_data_len before advancing the iterator. Both cases can let

a zero data SGL count reach sg_alloc_table_chained(), which triggers

BUG_ON(!nents).

Reject protection lengths that cover or exceed the payload before

subtracting prot_bytes and advancing the iterator. Also propagate

negative errors from the protection SGL calculation before calling the

allocator, matching the data SGL path. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74703
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74703

Source

Reference

NVD

CVE