Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3943
Advisory Released Date: 2026-09-28
Advisory Updated Date: 2026-09-28
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)
Affected Packages:
gvfs
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update gvfs or yum update --advisory ALAS2-2026-3943 to update your system.
aarch64:
gvfs-1.36.2-3.amzn2.0.3.aarch64
gvfs-client-1.36.2-3.amzn2.0.3.aarch64
gvfs-devel-1.36.2-3.amzn2.0.3.aarch64
gvfs-fuse-1.36.2-3.amzn2.0.3.aarch64
gvfs-smb-1.36.2-3.amzn2.0.3.aarch64
gvfs-archive-1.36.2-3.amzn2.0.3.aarch64
gvfs-gphoto2-1.36.2-3.amzn2.0.3.aarch64
gvfs-afc-1.36.2-3.amzn2.0.3.aarch64
gvfs-afp-1.36.2-3.amzn2.0.3.aarch64
gvfs-mtp-1.36.2-3.amzn2.0.3.aarch64
gvfs-goa-1.36.2-3.amzn2.0.3.aarch64
gvfs-tests-1.36.2-3.amzn2.0.3.aarch64
gvfs-debuginfo-1.36.2-3.amzn2.0.3.aarch64
i686:
gvfs-1.36.2-3.amzn2.0.3.i686
gvfs-client-1.36.2-3.amzn2.0.3.i686
gvfs-devel-1.36.2-3.amzn2.0.3.i686
gvfs-fuse-1.36.2-3.amzn2.0.3.i686
gvfs-smb-1.36.2-3.amzn2.0.3.i686
gvfs-archive-1.36.2-3.amzn2.0.3.i686
gvfs-gphoto2-1.36.2-3.amzn2.0.3.i686
gvfs-afc-1.36.2-3.amzn2.0.3.i686
gvfs-afp-1.36.2-3.amzn2.0.3.i686
gvfs-mtp-1.36.2-3.amzn2.0.3.i686
gvfs-goa-1.36.2-3.amzn2.0.3.i686
gvfs-tests-1.36.2-3.amzn2.0.3.i686
gvfs-debuginfo-1.36.2-3.amzn2.0.3.i686
src:
gvfs-1.36.2-3.amzn2.0.3.src
x86_64:
gvfs-1.36.2-3.amzn2.0.3.x86_64
gvfs-client-1.36.2-3.amzn2.0.3.x86_64
gvfs-devel-1.36.2-3.amzn2.0.3.x86_64
gvfs-fuse-1.36.2-3.amzn2.0.3.x86_64
gvfs-smb-1.36.2-3.amzn2.0.3.x86_64
gvfs-archive-1.36.2-3.amzn2.0.3.x86_64
gvfs-gphoto2-1.36.2-3.amzn2.0.3.x86_64
gvfs-afc-1.36.2-3.amzn2.0.3.x86_64
gvfs-afp-1.36.2-3.amzn2.0.3.x86_64
gvfs-mtp-1.36.2-3.amzn2.0.3.x86_64
gvfs-goa-1.36.2-3.amzn2.0.3.x86_64
gvfs-tests-1.36.2-3.amzn2.0.3.x86_64
gvfs-debuginfo-1.36.2-3.amzn2.0.3.x86_64