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.
総合評価: CVE-2026-33179 は低リスク(25.5/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 0.20%、9 パーセンタイル) 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.01% | 0.20% | +0.18% |
| 2 | 2026-03-21 | — | 0.01% | — |
EPSS の全履歴 (全 2 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 5.5 | 3.1 | MEDIUM |
|
1.8 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2026-33179 unimportant priority: Debian including 1 source packages (fuse3), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-33179 |
gentoo
|
normal | CVE-2026-33179: 1 GLSA(s) (202604-03), 1 atom(s) (sys-fs/fuse); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2026-33179 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-33179 |
suse
|
medium | CVE-2026-33179 severity moderate: SUSE including 12 source package names (fuse, fuse-devel, …), 161 product×package rows across 27 product lines (SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS, … (27 product lines)): Known Not Affected 161. | https://www.suse.com/security/cve/CVE-2026-33179/ |
ubuntu
|
medium | CVE-2026-33179 medium priority: Ubuntu including 2 source packages (fuse, fuse3), 13 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): not-affected 12, released 1. | https://ubuntu.com/security/CVE-2026-33179 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| libfuse_project | libfuse | >= 3.18.0, < 3.18.2 | cpe:2.3:a:libfuse_project:libfuse:*:*:*:*:*:*:*:* |