CVE-2026-33179

Published: Mar 20, 2026 Last Modified: Mar 20, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,5
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high

Description

AI Translation 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.

476

NULL Pointer Dereference

Stable
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability Integrity Confidentiality
Potential Impacts:
Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands Read Memory Modify Memory
Applicable Platforms
Languages: C, C#, C++, Go, Java
Likelihood of Exploit: Medium
View CWE Details
https://github.com/libfuse/libfuse/commit/7beb86c09b6ec5aab…
https://github.com/libfuse/libfuse/commit/7beb86c09b6ec5aab14dc25256ed8a5ad1855…
https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2
https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2
https://github.com/libfuse/libfuse/security/advisories/GHSA…
https://github.com/libfuse/libfuse/security/advisories/GHSA-x669-v3mq-r358