Skip to content
Fencer Vulns
medium 4.3

CVE-2026-84270 json

Gvfs: mtp: out-of-bounds read in do_read()

published 2026-09-01 2 mo ago modified 2026-11-06 3 d ago also EUVD-2026-69298

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 4%
public exploits
0
none known

Summary

A flaw was found in the MTP backend in gvfs. When reading a file from a mounted MTP device, do_read() in gvfsbackendmtp.c trusts the data length returned by the device without limiting it to the original size requested by the client. If a malicious MTP device responds with more bytes than requested, this unrestricted length is passed directly to memcpy(). This causes the operation to read memory outside the intended boundaries. This allows an attacker who plugs in a malicious MTP device to cause a segmentation fault when a file is read and crash the gvfsd-mtp process, resulting in a denial of service.

Patch / fix

  • GNOME gvfs 1.60.2
  • gvfs Debian 14 1.62.0-1

debian advisories DEBIAN-CVE-2026-84270

  • gvfs Ubuntu 22.04 LTS 1.48.2-0ubuntu1.3
  • gvfs Ubuntu 24.04 LTS 1.54.4-0ubuntu1~24.04.5
  • gvfs Ubuntu 26.04 LTS 1.60.0-1ubuntu0.2

ubuntu advisories UBUNTU-CVE-2026-84270

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • gvfs SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Desktop Applications 15 SP7 1.52.2-150600.3.9.1
  • gvfs SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.48.2-150400.4.15.1
  • gvfs SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.28.3-18.12.1

suse advisories SUSE-SU-2026:4240-1SUSE-SU-2026:4238-1SUSE-SU-2026:4200-1

  • gvfs openSUSE Leap 16.0 1.59.90-160000.3.1
  • gvfs openSUSE Tumbleweed 1.60.3-1.1

opensuse advisories openSUSE-SU-2026:21875-1openSUSE-SU-2026:11788-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-84270 updated cvss 4.3

gvfs: MTP: out-of-bounds read in do_read()

  • Red Hat Enterprise Linux 6 gvfs-afc, gvfs-smb, gvfs-fuse, gvfs-archive, gvfs-gphoto2, gvfs-obexftp, +1 more
    affected: workaround, no fix planned “To mitigate this vulnerability, do not connect untrusted or unknown MTP devices to the system.”
  • Red Hat Enterprise Linux 7 gvfs, gvfs-afc, gvfs-afp, gvfs-goa, gvfs-mtp, gvfs-smb, +6 more Red Hat Enterprise Linux 8 gvfs, gvfs-afc, gvfs-afp, gvfs-goa, gvfs-mtp, gvfs-smb, +5 more Red Hat Enterprise Linux 9 gvfs, gvfs-goa, gvfs-mtp, gvfs-smb, gvfs-fuse, gvfs-client, +2 more Red Hat Enterprise Linux 10 gvfs 1.54.4-5.el10
    affected: workaround, no fix available “To mitigate this vulnerability, do not connect untrusted or unknown MTP devices to the system.”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • GNOME gvfs
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.