Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-84268: 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.
Fixed packages 13
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | gvfs | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-afc | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-afp | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-archive | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-client | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-debuginfo | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-devel | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-fuse | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-goa | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-gphoto2 | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-mtp | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-smb | 0:1.36.2-3.amzn2.0.3 |
| Amazon Linux · 2 | gvfs-tests | 0:1.36.2-3.amzn2.0.3 |
Vulnerabilities 1
-
High 8.8
Gvfs: 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 a…
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2026-84268.html