CVE-2026-84267

A flaw was found in the SFTP backend in gvfs. When mounting a share, a malicious SFTP server can cause readstring() to allocate a buffer with a certain length but the function does not verify that the buffer is completely filled, leaving the remainder of the buffer containing uninitialized heap contents. If the server sends a short FXPHANDLE reply, these uninitialized bytes are taken as the file handle. The client will then echo these uninitialized bytes back to the server on all subsequent requests using that handle. With a length of 128 bytes, this issue allows the malicious server to deterministically read uninitialized heap memory from the gvfsd-sftp process, leaking its heap base and the load address of the libgio library, resulting in a deterministic defeat of Address Space Layout Randomization (ASLR).

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84267.json",
    "cna_assigner": "redhat",
    "cwe_ids": [
        "CWE-908"
    ]
}

References

Affected packages

Git / gitlab.gnome.org/gnome/gvfs

Affected ranges

Type

GIT

Repo

https://gitlab.gnome.org/gnome/gvfs

Events

Introduced

d0e6d130792fa91d93c44e8c1610733cfa9a8e76

Fixed

5651571370400cf0a114f61af2fa96e0ff4784d5

Database specific

Show details

{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "1.10.0"
        },
        {
            "fixed": "1.60.2"
        }
    ]
}

Affected versions

1.*

1.10.0

1.11.3

1.11.4

1.11.5

1.12.0

1.12.1

1.13.0

1.13.1

1.13.2

1.13.3

1.13.4

1.13.5

1.13.6

1.13.7

1.13.8

1.13.9

1.14.0

1.15.0

1.15.1

1.15.2

1.15.3

1.15.4

1.16.0

1.17.0

1.17.1

1.17.2

1.17.3

1.17.90

1.18.0

1.18.1

1.18.2

1.19.1

1.19.2

1.19.3

1.19.4

1.19.5

1.19.90

1.20.0

1.21.1

1.21.2

1.21.3

1.21.4

1.21.90

1.21.92

1.22.0

1.23.1

1.23.2

1.23.3

1.23.4

1.23.90

1.23.92

1.24.0

1.25.1

1.25.2

1.25.3

1.25.4

1.25.4.1

1.25.90

1.25.91

1.25.92

1.26.0

1.26.1

1.26.1.1

1.26.2

1.27.3

1.27.4

1.27.90

1.27.91

1.27.92

1.28.0

1.28.1

1.29.1

1.29.2

1.29.3

1.29.4

1.29.90

1.29.91

1.29.92

1.30.0

1.31.1

1.31.2

1.31.3

1.31.4

1.31.90

1.31.91

1.31.92

1.32.0

1.33.1

1.33.3

1.33.90

1.33.91

1.33.92

1.34.0

1.35.1

1.35.2

1.35.3

1.35.4

1.35.90

1.35.91

1.35.92

1.36.0

1.37.1

1.37.2

1.37.4

1.37.90

1.37.91

1.38.0

1.39.1

1.39.3

1.39.4

1.39.90

1.39.91

1.39.92

1.40.0

1.41.1

1.41.2

1.41.3

1.41.4

1.41.90

1.41.91

1.42.0

1.43.1

1.43.2

1.43.90

1.43.91

1.43.92

1.44.0

1.44.1

1.45.2

1.45.3

1.45.90

1.45.92

1.46.0

1.46.1

1.47.1

1.47.90

1.47.91

1.48.0

1.48.1

1.49.1

1.49.90

1.50.0

1.50.1

1.50.2

1.50.3

1.50.4

1.51.1

1.51.90

1.51.91

1.52.0

1.52.1

1.53.1

1.53.90

1.53.91

1.54.0

1.54.1

1.55.1

1.55.90

1.56.0

1.56.1

1.57.1

1.57.2

1.58.0

1.59.1

1.59.90

1.60.0

1.60.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84267.json"