CVE Watch15 jul 2026

CVE-2026-33150

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 t

CVSS

7.8

Alto

EPSS

0.3%

p24

KEV

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Exploit Today

0-100

Publicado: 20 mar 2026 · Última mod.: 15 jul 2026 · CWE-416 · CWE-825

EPSS · 30d

0.3%EPSS · 30 días0.3%

2026-08-132026-09-10

Descripción técnica

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.

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