CVE-2026-90435

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-90435

Key Details

CVE	CVE-2026-90435
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; 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 high.
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:

RDMA/mlx5: Fix integer overflow of user QP buffer size

set_user_buf_size() computes the QP buffer size by left-shifting the

user-supplied rq.wqe_cnt and rq.wqe_shift values as signed integers.

A sufficiently large rq.wqe_cnt causes signed integer overflow, which

is undefined behavior, and yields a small or negative buf_size, causing

ib_umem_get() to map a buffer smaller than the hardware will actually

write into.

Replace the shifts and addition with check_shl_overflow() and

check_add_overflow(), rejecting invalid user inputs.

Moreover, guard the identical shift computing qp->sq.offset in

_create_user_qp() before set_user_buf_size() is reached. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90435
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90435

Source

Reference

NVD

CVE