Linux Distros Unpatched Vulnerability : CVE-2026-33179

medium Nessus Plugin ID 303266

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- libfuse is the reference implementation of the Linux FUSE. From version 3.18.0 to before version 3.18.2, a NULL pointer dereference and memory leak in fuse_uring_init_queue allows a local user to crash the FUSE daemon or cause resource exhaustion. When numa_alloc_local fails during io_uring queue entry setup, the code proceeds with NULL pointers. When fuse_uring_register_queue fails, NUMA allocations are leaked and the function incorrectly returns success. Only the io_uring transport is affected; the traditional /dev/fuse path is not affected. PoC confirmed with AddressSanitizer/LeakSanitizer. This issue has been patched in version 3.18.2. (CVE-2026-33179)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: Medium

ID: 303266

File Name: unpatched_CVE_2026_33179.nasl

Version: 1.6

Type: Local

Agent: unix

Family: Misc.

Published: 3/21/2026

Updated: 5/22/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.8

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-33179

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5.1

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:fuse-libs, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:fuse-devel, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:fuse-devel, p-cpe:/a:redhat:enterprise_linux:fuse, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:fuse-libs, p-cpe:/a:centos:centos:fuse, p-cpe:/a:centos:centos:fuse-sshfs, p-cpe:/a:redhat:enterprise_linux:fuse-sshfs, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:canonical:ubuntu_linux:fuse3

Required KB Items: Host/OS/identifier, Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 3/20/2026

Reference Information

CVE: CVE-2026-33179

Detections

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