{"id":"DEBIAN-CVE-2026-84268","details":"A flaw was found 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.","modified":"2026-09-17T16:00:08.778331377Z","published":"2026-09-01T16:17:37.563Z","upstream":["CVE-2026-84268"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-84268"}],"affected":[{"package":{"name":"gvfs","ecosystem":"Debian:12","purl":"pkg:deb/debian/gvfs?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.50.3-1","1.50.3-1+deb12u1","1.50.4-1","1.50.4-2","1.50.4-3","1.50.6-1","1.51.90-1","1.51.91-1","1.52.0-1","1.52.1-1","1.52.2-1","1.53.90-1","1.53.90-2","1.53.90-3","1.53.90-4","1.54.0-1","1.54.0-2","1.54.0-3","1.54.0-4","1.54.1-1","1.54.2-1","1.54.2-2","1.55.90-1","1.55.90-2","1.56.0-1","1.56.0-2","1.56.1-1","1.57.1-1","1.57.2-1","1.57.2-2","1.57.2-3","1.58.0-1","1.58.0-2","1.59.1-1","1.59.90-1","1.59.90-2","1.59.90-3","1.60.0-1","1.60.0-2","1.62.0-1","1.62.0-2","1.62.0-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84268.json"}},{"package":{"name":"gvfs","ecosystem":"Debian:13","purl":"pkg:deb/debian/gvfs?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.57.2-2","1.57.2-2+deb13u1","1.57.2-3","1.58.0-1","1.58.0-2","1.59.1-1","1.59.90-1","1.59.90-2","1.59.90-3","1.60.0-1","1.60.0-2","1.62.0-1","1.62.0-2","1.62.0-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84268.json"}},{"package":{"name":"gvfs","ecosystem":"Debian:14","purl":"pkg:deb/debian/gvfs?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.62.0-1"}]}],"versions":["1.57.2-2","1.57.2-3","1.58.0-1","1.58.0-2","1.59.1-1","1.59.90-1","1.59.90-2","1.59.90-3","1.60.0-1","1.60.0-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84268.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}