CVE-2026-68419

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-68419

Key Details

CVE	CVE-2026-68419
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
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/irdma: Prevent rereg_mr for non-mem regions

When a QP/CQ/SRQ is created, a two step process is used

where the buffer is allocated in userspace and explicitly

registered with the normal reg_mr mechanism prior to creating

the actual QP/CQ/SRQ object.

These special registrations are indicated via an ABI field

so the driver knows that they do not have a valid mkey and

to skip the actual CQP command submission.

Since these are real MR objects from the core's perspective,

it is possible for a user application to invoke rereg_mr on them

and cause a real CQP op to be emitted with the zero-initialized

mkey value of 0.

Fix this by preventing rereg_mr on these special regions. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-68419
CVE	https://www.cve.org/CVERecord?id=CVE-2026-68419

Source

Reference

NVD

CVE