CVE catalog
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 cras
- Severity
- Medium · CVSS 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.20% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | fuse3 | sid | 3.18.3-1 | fixed |
| Debian | fuse3 | forky | 3.18.3-1 | fixed |
| Debian | fuse3 | trixie | 3.17.2-3 | not affected |
| Debian | fuse3 | bookworm | 3.14.0-4 | not affected |
| Cpe | fuse3 | Not reported | Not reported | not affected |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | fuse3 | source | sid | 3.18.2-1 | not yet assigned | Not reported | Not reported |
| Debian | fuse3 | source | forky | 3.18.2-1 | not yet assigned | Not reported | Not reported |
| Debian | fuse3 | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | fuse3 | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [fuse3]Not affected
Details (2)
3.14.0-4· amd64 · bookwormNot affected
nvd · fuse3 · debian · bookworm
3.14.0-4· arm64 · bookwormNot affected
nvd · fuse3 · debian · bookworm
- [libfuse3-3]Not affected
Source package: [fuse3]
Details (2)
3.14.0-4· amd64 · bookwormNot affected
nvd · fuse3 · debian · bookworm
3.14.0-4· arm64 · bookwormNot affected
nvd · fuse3 · debian · bookworm
- [libfuse3-dev]Not affected
Source package: [fuse3]
Details (2)
3.14.0-4· amd64 · bookwormNot affected
nvd · fuse3 · debian · bookworm
3.14.0-4· arm64 · bookwormNot affected
nvd · fuse3 · debian · bookworm
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-33179]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-33179]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-33179]
- [https://security-tracker.debian.org/tracker/CVE-2026-33179]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33179.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0913.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]