CVE-2026-33150

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 76% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

Published

March 20, 2026

Last Modified

July 15, 2026

Advisory Details (6)

Auto-updated Jul 1, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github, redhat.
redhat

Affected: Red Hat Enterprise Linux 7",

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33150.json
redhat

2449771 – (CVE-2026-33150) CVE-2026-33150 libfuse: libfuse: Arbitrary code execution via use-after-free in io_uring subsystem

https://bugzilla.redhat.com/show_bug.cgi?id=2449771
redhatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-33150
githubMentions a patch (unverified)🟡 PoC Available

Use After Free in libfuse · Advisory · libfuse/libfuse · GitHub

https://github.com/libfuse/libfuse/security/advisories/GHSA-qxv7-xrc2-qmfx
github_release Patch Available

fuse-3.18.2

Patch available: libfuse/libfuse fuse-3.18.2

https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2
github_commit Patch Available

commit 49fcd891a58f (libfuse/libfuse)

Patch available: libfuse/libfuse fuse-3.18.2 (contains commit 49fcd891a58f)

https://github.com/libfuse/libfuse/commit/49fcd891a58f622c098e2ca67d66086f7b213836

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
fuse33.17.2-3, 3.17.3-1, 3.17.4-1, 3.18.1-1
  • every version up to 3.18.2-1: fixed in 3.18.2-1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 114 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2026-33150?
CVE-2026-33150 is a high vulnerability published on March 20, 2026. 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 iouring subsystem of libfuse allows a local attacker to crash FUSE filesystem processes and potentially execute arbitrary code. When iouring thread creation…
When was CVE-2026-33150 disclosed?
CVE-2026-33150 was first published on March 20, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33150 actively exploited?
CVE-2026-33150 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33150?
CVE-2026-33150 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-33150?
A fix for CVE-2026-33150 is available: update to the fixed version the vendor names in its advisory.

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