CVE-2026-84268
Publication date 1 September 2026
Last updated 1 October 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| gvfs | 26.04 LTS resolute |
Fixed 1.60.0-1ubuntu0.1
|
| 24.04 LTS noble |
Fixed 1.54.4-0ubuntu1~24.04.4
|
|
| 22.04 LTS jammy |
Fixed 1.48.2-0ubuntu1.2
|
|
| 20.04 LTS focal |
Fixed 1.44.1-1ubuntu1.2+esm1
|
|
| 18.04 LTS bionic |
Fixed 1.36.1-0ubuntu1.3.3+esm1
|
|
| 16.04 LTS xenial |
Fixed 1.28.2-1ubuntu1~16.04.3+esm1
|
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CVSS version: CVSS v3.0
Base score
8.8 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8845-1
- GVfs vulnerabilities
- 30 September 2026