VULNERABILITY INTELLIGENCE
CVE-2026-84268
CVSS score8.8 HIGH
EPSS probability0.62%
CISA KEVNot currently listed
Published2026-09-01
Last modified2026-10-21
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Description
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.
Weakness classification
- secalert@redhat.com: CWE-122