{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-33150", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-17T21:17:08.885Z", "datePublished": "2026-03-20T20:20:29.963Z", "dateUpdated": "2026-07-15T01:07:15.081Z" }, "containers": { "cna": { "title": "Use After Free in libfuse", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-416", "lang": "en", "description": "CWE-416: Use After Free", "type": "CWE" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" } } ], "references": [ { "name": "https://github.com/libfuse/libfuse/security/advisories/GHSA-qxv7-xrc2-qmfx", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/libfuse/libfuse/security/advisories/GHSA-qxv7-xrc2-qmfx" }, { "name": "https://github.com/libfuse/libfuse/commit/49fcd891a58f622c098e2ca67d66086f7b213836", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/libfuse/libfuse/commit/49fcd891a58f622c098e2ca67d66086f7b213836" }, { "name": "https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/libfuse/libfuse/releases/tag/fuse-3.18.2" } ], "affected": [ { "vendor": "libfuse", "product": "libfuse", "versions": [ { "version": ">= 3.18.0, < 3.18.2", "status": "affected" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-20T20:20:29.963Z" }, "descriptions": [ { "lang": "en", "value": "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." } ], "source": { "advisory": "GHSA-qxv7-xrc2-qmfx", "discovery": "UNKNOWN" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-03-26T00:00:00+00:00", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-33150" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-27T03:55:40.426Z" } }, { "affected": [ { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:7" ], "defaultStatus": "unaffected", "packageName": "fuse", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:8" ], "defaultStatus": "affected", "packageName": "fuse-sshfs", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat" } ], "datePublic": "2026-03-20T20:20:29.963Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in libfuse. A use-after-free vulnerability in the io_uring subsystem allows a local attacker to potentially execute arbitrary code and crash FUSE (Filesystem in Userspace) filesystem processes. This occurs when io_uring thread creation fails due to resource exhaustion, such as limits imposed by cgroup pids.max, causing a dangling pointer to be stored and later used during session shutdown. This vulnerability is reliably triggered in containerized environments." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-825", "description": "Expired Pointer Dereference", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-33150" }, { "name": "RHBZ#2449771", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2449771" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33150.json" } ], "timeline": [ { "lang": "en", "time": "2026-03-20T21:01:20.625Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-03-20T20:20:29.963Z", "value": "Made public." } ], "title": "libfuse: libfuse: Arbitrary code execution via use-after-free in io_uring subsystem", "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-07-15T01:07:15.081Z" } } ] } }