CVE-2026-23263
Undergoing Analysis Undergoing Analysis - In Progress

Memory Leak in Linux Kernel io_uring Component Fixed

Publication date: 2026-03-18

Last updated on: 2026-05-22

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: io_uring/zcrx: fix page array leak d9f595b9a65e ("io_uring/zcrx: fix leaking pages on sg init fail") fixed a page leakage but didn't free the page array, release it as well.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-03-18
Last Modified
2026-05-22
Generated
2026-07-28
AI Q&A
2026-03-18
EPSS Evaluated
2026-07-26
NVD
CVE-2026-23263
EUVD
EUVD-2026-12900

Affected Vendors & Products

Showing 9 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 6.17 (inc) to 6.18.10 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-401 The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability in the Linux kernel involves the io_uring subsystem, specifically related to the zcrx component. The issue was a page array leak where, although leaking pages on scatter-gather (sg) initialization failure were fixed, the page array itself was not freed properly. The fix ensures that the page array is also released, preventing resource leakage.

Detection Guidance

I don't know

Impact Analysis

The vulnerability can lead to resource leakage in the Linux kernel, specifically leaking memory pages and page arrays during certain io_uring operations. This could potentially degrade system performance or stability over time due to unreleased memory resources.

Compliance Impact

I don't know

Mitigation Strategies

I don't know

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-23263. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart