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Vulnerability · Published Sep 1, 2026 · Assigned by redhat

CVE-2026-84268Gvfs: sftp: heap-based buffer overflow in read_reply()

High 8.8

In plain English

A high-severity heap buffer overflow in gvfs from GNOME. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.6%top 50.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10gvfs1.54.4-4.el10_2.1ALSA-2026:73998
AlmaLinux:8gvfs1.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:9gvfs1.48.1-8.el9_8.1ALSA-2026:74370
AlmaLinux:8gvfs-afc1.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:8gvfs-afp1.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:8gvfs-archive1.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:10gvfs-client1.54.4-4.el10_2.1ALSA-2026:73998
AlmaLinux:8gvfs-client1.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:9gvfs-client1.48.1-8.el9_8.1ALSA-2026:74370
AlmaLinux:8gvfs-devel1.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:9gvfs-devel1.48.1-8.el9_8.1ALSA-2026:74370
AlmaLinux:10gvfs-fuse1.54.4-4.el10_2.1ALSA-2026:73998
AlmaLinux:8gvfs-fuse1.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:9gvfs-fuse1.48.1-8.el9_8.1ALSA-2026:74370
AlmaLinux:10gvfs-goa1.54.4-4.el10_2.1ALSA-2026:73998
AlmaLinux:8gvfs-goa1.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:9gvfs-goa1.48.1-8.el9_8.1ALSA-2026:74370
AlmaLinux:10gvfs-gphoto21.54.4-4.el10_2.1ALSA-2026:73998
AlmaLinux:8gvfs-gphoto21.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:9gvfs-gphoto21.48.1-8.el9_8.1ALSA-2026:74370
AlmaLinux:10gvfs-mtp1.54.4-4.el10_2.1ALSA-2026:73998
AlmaLinux:8gvfs-mtp1.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:9gvfs-mtp1.48.1-8.el9_8.1ALSA-2026:74370
AlmaLinux:10gvfs-smb1.54.4-4.el10_2.1ALSA-2026:73998
AlmaLinux:8gvfs-smb1.36.2-22.el8_10ALSA-2026:73997
AlmaLinux:9gvfs-smb1.48.1-8.el9_8.1ALSA-2026:74370
Debian:12gvfsno fix listedDEBIAN-CVE-2026-84268
Debian:13gvfsno fix listedDEBIAN-CVE-2026-84268
Debian:14gvfs1.62.0-1DEBIAN-CVE-2026-84268
Rocky Linux:10gvfs0:1.54.4-4.el10_2.1RLSA-2026:73998
Rocky Linux:8gvfs0:1.36.2-22.el8_10RLSA-2026:73997
Rocky Linux:9gvfs0:1.48.1-8.el9_8.1RLSA-2026:74370
Ubuntu:22.04:LTSgvfs1.48.2-0ubuntu1.2UBUNTU-CVE-2026-84268
Ubuntu:22.04:LTSgvfs1.48.2-0ubuntu1.2USN-8845-1
Ubuntu:24.04:LTSgvfs1.54.4-0ubuntu1~24.04.4USN-8845-1
Ubuntu:24.04:LTSgvfs1.54.4-0ubuntu1~24.04.4UBUNTU-CVE-2026-84268
Ubuntu:26.04:LTSgvfs1.60.0-1ubuntu0.1USN-8845-1
Ubuntu:26.04:LTSgvfs1.60.0-1ubuntu0.1UBUNTU-CVE-2026-84268

Affected products (as reported)

VendorProductVersions
GNOME gvfs 0 – before 1.60.2
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 6 see references

Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References