Amazon Linux 2 : gvfs (ALAS-2026-3943)

high Nessus Plugin ID 351080

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of gvfs installed on the remote host is prior to 1.36.2-3. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3943 advisory.

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. (CVE-2026-84268)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update gvfs' or or 'yum update --advisory ALAS2-2026-3943' to update your system.

Plugin Details

Severity: High

ID: 351080

File Name: al2_ALAS-2026-3943.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 9/29/2026

Updated: 9/29/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.26

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-84268

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:gvfs-afc, p-cpe:/a:amazon:linux:gvfs-afp, p-cpe:/a:amazon:linux:gvfs-archive, p-cpe:/a:amazon:linux:gvfs-client, p-cpe:/a:amazon:linux:gvfs-debuginfo, p-cpe:/a:amazon:linux:gvfs-devel, p-cpe:/a:amazon:linux:gvfs-fuse, p-cpe:/a:amazon:linux:gvfs-goa, p-cpe:/a:amazon:linux:gvfs-gphoto2, p-cpe:/a:amazon:linux:gvfs-mtp, p-cpe:/a:amazon:linux:gvfs-smb, p-cpe:/a:amazon:linux:gvfs-tests, p-cpe:/a:amazon:linux:gvfs

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 9/1/2026

Reference Information

CVE: CVE-2026-84268

Detections

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