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in the SFTP backend in gvfs. When mounting a share and reading a file, a malicious SFTP server can cause read_reply() to process a length that exceeds the size requested by the client. The function does not verify the server-provided length against the allocated buffer size, causing the operation to write past the intended boundaries. This issue allows a malicious server to corrupt adjacent heap memory in the gvfsd-sftp process, resulting in a denial of service as the process aborts upon detecting the heap corruption or potentially allowing arbitrary code execution."}], "id": "CVE-2026-84268", "lastModified": "2026-10-20T17:17:41.617", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-84268", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-01T18:01:43.116734Z", "version": "2.0.3"}}]}, "published": "2026-09-01T16:17:37.563", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:73997"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:73998"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:74370"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:85940"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:85941"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:85942"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:85943"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:85944"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:85945"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-84268"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526485"}, {"source": "secalert@redhat.com", "url": "https://gitlab.gnome.org/GNOME/gvfs/-/issues/862"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

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