CVE-2026-33150

HIGHPre-NVD 7.87.8
EchelonGraph scoreLOW confidence

This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: secondary
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
7.8(low)
EPSS
22.8%
KEV
Not listed

Published

March 20, 2026

Last Modified

June 30, 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
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-33150
github Patch Available🟡 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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 13× 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.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:15 UTCEPSS rescore
  4. 2026-07-07 13:46 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-01 15:06 UTCEPSS rescore
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 04:38 UTCEG score recompute
  13. 2026-06-30 04:32 UTCNVD updatefirst tracked

Related CVEs(same CWE)

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 in the National Vulnerability Database on March 20, 2026, with the most recent update on June 30, 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 22.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-33150?
CVE-2026-33150 has a CVSS v3 base score of 7.8 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-33150?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33150, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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