CVE-2026-45995

0.0

io_uring/zcrx: fix user_struct uaf

Overview
Vulnerability Timeline

Overview

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix user_struct uaf io_free_rbuf_ring() usees a struct user_struct, which io_zcrx_ifq_free() puts it down before destroying the ring.

Details

INFO

Published Date :

May 27, 2026, 2:17 p.m.

Last Modified :

May 27, 2026, 2:48 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Impact

Affected Products

The following products are affected by CVE-2026-45995 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID	Vendor	Product	Action
1	Linux	linux_kernel

: Total Affected Vendor : 1 | Products : 1

Solution

Address a use-after-free vulnerability in io_uring/zcrx by correcting resource management.

Apply the patch that resolves the user_struct use-after-free issue.
Ensure proper cleanup of ring structures after freeing buffers.
Update the Linux kernel to the latest secure version.

References

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-45995.

URL	Resource
https://git.kernel.org/stable/c/0fcccfd87152f957fa8312b841f6efef42a05a20
https://git.kernel.org/stable/c/9feb88eeda6d288f93fcfb6bca563f89e316479d

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-45995 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-45995 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-45995 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-45995 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

May. 27, 2026

Action	Type	New Value
Added	Description	In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix user_struct uaf io_free_rbuf_ring() usees a struct user_struct, which io_zcrx_ifq_free() puts it down before destroying the ring.
Added	Reference	https://git.kernel.org/stable/c/0fcccfd87152f957fa8312b841f6efef42a05a20
Added	Reference	https://git.kernel.org/stable/c/9feb88eeda6d288f93fcfb6bca563f89e316479d

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.

Memory Corruption

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