Report: CVE-2026-33179 - libfuse: NULL Pointer Dereference and Memory Leak in io_uring Queue Initialization
CVE ID :CVE-2026-33179 Published : March 20, 2026, 9:17 p.m. | 1 hour, 7 minutes ago Description :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. Severity: 5.5 | MEDIUM Visit the link for more details, such as CVSS details, affected products, timeline, and more...