CVE-2026-33150 is a high-severity use-after-free vulnerability (CVSS 7.8) affecting libfuse versions 3.18.0 through 3.18.1, specifically within its io_uring subsystem. A local attacker can exploit this with low complexity by triggering resource exhaustion during io_uring thread creation, leading to FUSE filesystem process crashes and potential arbitrary code execution. This issue is particularly relevant in containerized environments where resource limits are common. Currently, there is no evidence of active exploitation or public exploit code available, though it has generated some community discussion and media coverage. The vulnerability has been addressed in libfuse version 3.18.2.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.18.0, < 3.18.2CPE matchmatch criteria | cpe:2.3:a:libfuse_project:libfuse:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.