CVE-2026-90176

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-90176

Key Details

CVE	CVE-2026-90176
CVSS Score / Version	8.1 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is none.
Affected products	Linux Kernel

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:

ksmbd: Do not skip lock checks for single-byte ranges

check_lock_range() uses inclusive ranges. Its callers pass the end

offset as start + length - 1, so start == end represents a valid

single-byte range rather than an empty range.

The start == end shortcut therefore skips mandatory byte-range lock

checks for one-byte reads, writes, copychunk operations and one-byte

truncate ranges. A conflicting lock covering that byte is not checked

and the operation is allowed to proceed.

Remove the shortcut. The truncate size == inode->i_size case is already

handled by only calling check_lock_range() when the new size differs

from the current file size. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90176
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90176

Source

Reference

NVD

CVE