DEBIAN-CVE-2026-33179
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.
DEBIAN-CVE-2026-33179
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-33179
fuse3
Source reference: /affected/0/package/name
- Affected versions
- 3.17.2-3
Source reference:
/affected/0/versions3.17.3-1Source reference:
/affected/0/versions3.17.4-1Source reference:
/affected/0/versions3.18.1-1Source reference:
/affected/0/versions - Fixed versions
- 3.18.2-1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.18.2-1"
}
]
}
],
"package": {
"name": "fuse3",
"purl": "pkg:deb/debian/fuse3?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.17.2-3",
"3.17.3-1",
"3.17.4-1",
"3.18.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33179.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56359 · Revision 1
- Added to Heist Feed
- Publisher date