CVE-2026-90309

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-90309

Key Details

CVE	CVE-2026-90309
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/erdma: Hold CQ references when processing EQ events

EQ handlers look up CQs from dev->cq_xa and invoke CQ completion or

error callbacks outside the xarray lock. erdma_destroy_cq() can erase the

CQ from the xarray and free its queue buffer and doorbell record while a

previously scheduled EQ handler is still using the CQ.

Add a CQ refcount and take a reference under the xarray lock with

refcount_inc_not_zero(). Remove the CQ from the xarray before dropping

the destroy-path reference, then wait for in-flight EQ users before

releasing CQ resources. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-90309
CVE	https://www.cve.org/CVERecord?id=CVE-2026-90309

Source

Reference

NVD

CVE