DEBIAN-CVE-2026-33150
libfuse is the reference implementation of the Linux FUSE. From version 3.18.0 to before version 3.18.2, a use-after-free vulnerability in the io_uring subsystem of libfuse allows a local attacker to crash FUSE filesystem processes and potentially execute arbitrary code. When io_uring thread creation fails due to resource exhaustion (e.g., cgroup pids.max), fuse_uring_start() frees the ring pool structure but stores the dangling pointer in the session state, leading to a use-after-free when the session shuts down. The trigger is reliable in containerized environments where cgroup pids.max limits naturally constrain thread creation. This issue has been patched in version 3.18.2.
DEBIAN-CVE-2026-33150
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-2026-33150
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-2026-33150.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55924 · Revision 1
- Added to Heist Feed
- Publisher date