CVE-2026-84270 — MEDIUM (4.3)

Vulnerability Description

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.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Related Weaknesses (CWE)

CWE-125

References

FAQ

What is CVE-2026-84270?

CVE-2026-84270 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 origi...

How severe is CVE-2026-84270?

CVE-2026-84270 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-84270?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.