CVE-2026-33150

HIGH

Use After Free in libfuse

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-33150. PoCs published by abhinavagarwal07.

AI-analyzed exploit summary This repository appears to be a personal blog or research site for security vulnerability advisories by Abhinav Agarwal. It contains no exploit code but includes blog posts and configuration files for a Jekyll-based website.

Description

libfuse is the reference implementation of the Linux FUSE. From version 3.18.0 to before version 3.18.2, a use-after-free vulnerability in the io_uring subsystem of libfuse allows a local attacker to crash FUSE filesystem processes and potentially execute arbitrary code. When io_uring thread creation fails due to resource exhaustion (e.g., cgroup pids.max), fuse_uring_start() frees the ring pool structure but stores the dangling pointer in the session state, leading to a use-after-free when the session shuts down. The trigger is reliable in containerized environments where cgroup pids.max limits naturally constrain thread creation. This issue has been patched in version 3.18.2.

Exploits (1)

nomisec WRITEUP
by abhinavagarwal07 · poc
https://github.com/abhinavagarwal07/abhinavagarwal07.github.io

This repository appears to be a personal blog or research site for security vulnerability advisories by Abhinav Agarwal. It contains no exploit code but includes blog posts and configuration files for a Jekyll-based website.

Classification
Writeup 90%
Attack Type
N/a
Complexity
N/a
Reliability
N/a
Target: N/A
No auth needed
devstral-2 · analyzed Apr 09, 2026 Full analysis →

Scores

CVSS v3 7.8
EPSS 0.0031
EPSS Percentile 22.7%
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
Status published
Products (2)
libfuse/libfuse >= 3.18.0, < 3.18.2
libfuse_project/libfuse 3.18.0 - 3.18.2
Published Mar 20, 2026
Tracked Since Mar 21, 2026