CVE-2023-2598

HIGH

Linux Kernel 6.3-6.3.2 - Use-After-Free in io_uring Buffer Registration

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 5 public exploits for CVE-2023-2598. PoCs published by ysanatomic, SpongeBob-369, LLfam.

AI-analyzed exploit summary This repository contains a functional local privilege escalation (LPE) exploit for CVE-2023-2598, leveraging a vulnerability in the Linux kernel's io_uring subsystem. The exploit uses memory corruption techniques to leak kernel addresses and achieve arbitrary code execution in kernel mode.

Description

A flaw was found in the fixed buffer registration code for io_uring (io_sqe_buffer_register in io_uring/rsrc.c) in the Linux kernel that allows out-of-bounds access to physical memory beyond the end of the buffer. This flaw enables full local privilege escalation.

Exploits (5)

nomisec WORKING POC 92 stars
by ysanatomic · poc
https://github.com/ysanatomic/io_uring_LPE-CVE-2023-2598

This repository contains a functional local privilege escalation (LPE) exploit for CVE-2023-2598, leveraging a vulnerability in the Linux kernel's io_uring subsystem. The exploit uses memory corruption techniques to leak kernel addresses and achieve arbitrary code execution in kernel mode.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Complex
Reliability
Racy
Target: Linux kernel (specific versions affected by CVE-2023-2598)
No auth needed
Prerequisites: Linux system with vulnerable kernel · io_uring support enabled · Local user access
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WRITEUP 3 stars
by SpongeBob-369 · poc
https://github.com/SpongeBob-369/CVE-2023-2598

This repository provides a detailed technical analysis of CVE-2023-2598, a vulnerability in the Linux kernel's io_uring subsystem. The writeup explains the logical bug in the `io_sqe_buffer_register` function, where the folio coalescing logic fails to check for consecutive pages, leading to potential exploitation.

Classification
Writeup 95%
Attack Type
Lpe
Complexity
Complex
Reliability
Theoretical
Target: Linux Kernel (io_uring subsystem)
No auth needed
Prerequisites: Access to a vulnerable Linux kernel with io_uring enabled
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 1 stars
by LLfam · poc
https://github.com/LLfam/CVE-2023-2598

This repository contains a functional exploit for CVE-2023-2598, leveraging io_uring and memory manipulation techniques to achieve privilege escalation. The code demonstrates detailed knowledge of kernel structures and offsets, indicating a well-researched and operational PoC.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Complex
Reliability
Racy
Target: Linux Kernel (specific version not specified)
No auth needed
Prerequisites: Access to a vulnerable Linux kernel · Ability to execute code on the target system
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by guard-wait · poc
https://github.com/guard-wait/CVE-2023-2598_EXP

This repository contains a functional exploit for CVE-2023-2598, leveraging io_uring to achieve arbitrary memory write primitives, which are then used to spray heap and manipulate file structures (e.g., /etc/passwd). The exploit is written in C and targets the Linux kernel's io_uring subsystem.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Complex
Reliability
Reliable
Target: Linux Kernel (io_uring subsystem)
No auth needed
Prerequisites: Linux kernel with vulnerable io_uring implementation · Ability to execute code on the target system
devstral-2 · analyzed Feb 19, 2026 Full analysis →
nomisec WORKING POC
by cainiao159357 · poc
https://github.com/cainiao159357/CVE-2023-2598

This repository contains a functional exploit for CVE-2023-2598, leveraging a vulnerability in io_uring's handling of compound pages to achieve local privilege escalation (LPE) by manipulating the `cred` structure. The exploit includes detailed technical analysis of the vulnerability, including the misuse of `page_folio()` and the resulting out-of-bounds read/write.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Complex
Reliability
Reliable
Target: Linux kernel (io_uring subsystem)
No auth needed
Prerequisites: Linux kernel with io_uring support · Vulnerable kernel version
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (3)

Core 3

Scores

CVSS v3 7.8
EPSS 0.0137
EPSS Percentile 68.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-416 CWE-787
Status published
Products (6)
linux/linux_kernel 6.3 - 6.3.2
netapp/hci_baseboard_management_controller h300s
netapp/hci_baseboard_management_controller h410c
netapp/hci_baseboard_management_controller h410s
netapp/hci_baseboard_management_controller h500s
netapp/hci_baseboard_management_controller h700s
Published Jun 01, 2023
Tracked Since Feb 18, 2026