CVE-2026-33179 - libfuse: NULL Pointer Dereference and Memory Leak in io_uring Queue Initialization

CVE-2026-33179 - libfuse: NULL Pointer Dereference and Memory Leak in io_uring Queue Initialization

https://cvefeed.io/rssfeed/latest.atom / Fri, 03/20/2026 - 23:07
CVE ID :CVE-2026-33179
Published : March 20, 2026, 8:20 p.m. | 41 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: 0.0 | NA
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