Vulnerability-Lookup

CVE-2026-84270 (GCVE-0-2026-84270)

Vulnerability from cvelistv5 – Published: 2026-09-01 15:19 – Updated: 2026-09-01 17:58

Title

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

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.

Severity

4.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 17:24 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

redhat redhat root

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-84270	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2526794	issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/gvfs/-/issues/864

Impacted products

5 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2026-08-03 00:00

Credits

Red Hat would like to thank Keith Linneman (LinnemanLabs) for reporting this issue.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-84270

Vulnerability from fkie_nvd - Published: 2026-09-01 16:17 - Updated: 2026-09-01 21:03

Severity

4.3 (Medium) - CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-84270
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2526794
	secalert@redhat.com	https://gitlab.gnome.org/GNOME/gvfs/-/issues/864

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-2RH6-86RX-P849

Vulnerability from github – Published: 2026-09-01 18:30 – Updated: 2026-09-01 18:30

Details

Severity

4.3 (Medium)


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

Show details on source website

JSON

To clipboard

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    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-2rh6-86rx-p849",
  "modified": "2026-09-01T18:30:45Z",
  "published": "2026-09-01T18:30:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84270"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-84270"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526794"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/gvfs/-/issues/864"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-84270 (GCVE-0-2026-84270)

FKIE_CVE-2026-84270

GHSA-2RH6-86RX-P849

Tags

Sightings

Nomenclature