fuse3: libfuse is the reference implementation of the Linux FUSE
CVE-2026-33179 is fixed in fuse3 on 1 platform by DEBIAN-CVE-2026-33179 (version 3.18.2-1), released March 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| fuse3 · Debian 14 | 3.18.2-1 | DEBIAN-CVE-2026-33179 | Mar 20, 2026 |
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