Gvfs: sftp: heap-based buffer overflow in read_reply()
Historical advisory recorded 5 Nov 2026 00:54:08 UTC. Read the latest advisory.
cve-program · CVE-2026-84268
PublishedA 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.
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cve-program · CVE-2026-84268
PublishedGvfs: sftp: heap-based buffer overflow in read_reply()
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.
- Source published
- 1 Sep 2026 15:15:23 UTC
- Source modified
- 4 Nov 2026 23:46:58 UTC
- Saved here
- 5 Nov 2026 00:54:08 UTC
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- CVE Program Terms of Use
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CVSS 3.1 · 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H