CVE-2018-12633

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Source

https://cve.org/CVERecord?id=CVE-2018-12633

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12633.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2018-12633

Downstream

Published

2018-06-22T00:29:00Z

Modified

2026-03-14T14:32:13Z

Severity

6.3 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator

Summary

[none]

Details

An issue was discovered in the Linux kernel through 4.17.2. vbg_misc_device_ioctl() in drivers/virt/vboxguest/vboxguest_linux.c reads the same user data twice with copy_from_user. The header part of the user data is double-fetched, and a malicious user thread can tamper with the critical variables (hdr.size_in and hdr.size_out) in the header between the two fetches because of a race condition, leading to severe kernel errors, such as buffer over-accesses. This bug can cause a local denial of service and information leakage.

References

Affected packages

Git /

Affected ranges

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12633.json"

unresolved_ranges

[
    {
        "events":  [
            {
                "introduced":  "0"
            },
            {
                "last_affected":  "4.17.2"
            }
        ]
    }
]