CVE-2026-90324

high

Description

In the Linux kernel, the following vulnerability has been resolved: ublk: check import_ubuf() return value import_ubuf() can fail if the address range (provided by the userspace ublk server) is outside the allowed user address space. Return that 0 bytes were copied if import_ubuf() fails rather than passing an uninitialized struct iov_iter to ublk_copy_user_pages().

References

https://git.kernel.org/stable/c/5ac6019cb78e98c9608fda72726b36ddf8474dd7

https://git.kernel.org/stable/c/3831568792af75b6523fa93bb91560e29189cf55

https://git.kernel.org/stable/c/0121c84adb6a4cd6f7560b5895bd88f9899bbc1f

Details

Source: Mitre, NVD

Published: 2026-09-17

Updated: 2026-09-18

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00198