CVE-2026-84270
Publication date 1 September 2026
Last updated 3 November 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| gvfs | 26.10 stonking |
Not affected
|
| 26.04 LTS resolute |
Fixed in 1.60.0-1ubuntu0.2
|
|
| 24.04 LTS noble |
Fixed in 1.54.4-0ubuntu1~24.04.5
|
|
| 22.04 LTS jammy |
Fixed in 1.48.2-0ubuntu1.3
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
4.3 · Medium
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8970-1
- GVfs vulnerabilities
- 3 November 2026